What Do River Fish Eat Around Flagler Beach?

What do river fish eat? It depends on the species and the water it lives in. Across habitats, river fish eat aquatic insects and their larvae, zooplankton, small fish, shrimp, crabs, worms, snails, clams, oysters, algae and detritus, the decaying plant and animal matter that settles on the bottom. A bluegill in a freshwater pond feeds mainly on insects and larvae. A red drum in a tidal creek hunts crabs, shrimp and small fish along the bottom. A striped mullet grazes on algae and decaying material.

Around Flagler Beach, the answer gets more interesting because most of the local “rivers” are not freshwater rivers at all. The Matanzas River and the Halifax River are stretches of the Atlantic Intracoastal Waterway, a saltwater-influenced lagoon system that rises and falls with the tide. Bulow Creek is tidal for much of its length. The Tomoka River begins in inland forests and ends in a brackish marsh. True freshwater fishing lies farther inland, in places like Haw Creek and Crescent Lake in western Flagler County. Knowing which kind of water you are standing beside is the first step toward understanding what the fish there are eating.

This guide walks through the local food web, the waterways themselves, the diets of locally documented species, the forces that shift those diets, and how to use all of it to plan a better day on the water. Throughout, it separates established species biology from local documentation and from reasonable interpretation, so you can tell which is which.

What Do River Fish Eat? Understanding the Food Web Around Flagler Beach

A food web is simply a map of who eats whom. In the creeks, marshes and lagoons near Flagler Beach, that map starts with tiny organisms most visitors never notice and ends with the redfish, trout and drum that anglers come to catch.

Predators, Omnivores, Grazers and Detritus Feeders

Fish can be grouped loosely by how they feed. These are broad categories, not rigid boxes, and many species fall between them.

• Predators eat other animals, usually fish, shrimp or crabs. Spotted seatrout are a good local example: according to the Florida Museum, adults eat fishes and crustaceans and ambush prey with a quick lunge, using a pair of canine-like teeth at the front of the upper jaw.
• Omnivores eat both animal and plant material. Sheepshead are classified as omnivores by the Florida Museum, eating crabs, oysters, clams, barnacles and small fish, while young sheepshead also take algae.
• Grazers feed on algae and other plant growth. Striped mullet scrape algae and fine organic material, which is why you rarely catch one on a shrimp under a cork.
• Detritus feeders eat the decomposing matter that coats the bottom, along with the microbes living on it. Mullet also fall partly into this group.

Generalists blur these lines. Hardhead catfish, for instance, are described by Louisiana Sea Grant as eating almost anything: worms, snails, clams, shrimp, crabs, small fish and even mud and sand taken in while feeding.

How Small Prey Support Larger Fish

The fish anglers target sit near the top of a long chain. At its base are algae, both the microscopic kind drifting in the water and the films that coat mud, shells and plant stems. Zooplankton such as copepods feed on that algae. Grass shrimp, small crabs, worms and juvenile fish eat the zooplankton and the detritus. Predators then eat those smaller animals.

That chain explains why the same small creatures show up again and again in the diets of very different game fish. Grass shrimp, mud crabs and fiddler crabs appear in juvenile red drum diets, according to the South Carolina Department of Natural Resources. Mullet, menhaden and anchovies appear in the diets of seatrout, flounder and adult red drum. A healthy supply of small prey supports almost everything above it.

Natural Food Versus Bait

What a fish eats in nature and what an angler offers it are two different things. Bait works because it triggers a feeding response: it smells, moves or looks enough like food to provoke a bite. That does not mean it is a major part of the fish’s normal diet.

Live shrimp are a good example. Shrimp are genuine prey for red drum, seatrout and flounder, so a live shrimp is a natural offering for those species. But a fish might also strike a soft-plastic lure, a chunk of cut bait or a bright spoon that resembles nothing it normally eats. Feeding fish can be opportunistic, curious or aggressive. Catching a fish on a particular bait tells you something about its willingness to bite in that moment, not necessarily about what fills its stomach day to day.

Juveniles Often Eat Different Foods

A fish’s diet often changes dramatically as it grows. Biologists call this an ontogenetic diet shift.

• Newly hatched spotted seatrout feed mainly on copepods, then shift to mysid shrimp and other shrimp, and finally to fish as adults, according to the Florida Museum.
• Red drum larvae eat zooplankton. Juveniles move on to opossum shrimp, grass shrimp, mud minnows and small crabs. Adults eat menhaden, spot, anchovies and blue crabs (SCDNR).
• Young Florida bass start on zooplankton and begin eating small fish at about an inch long, according to the FWC.

This matters for observers and anglers alike. The small fish darting along a marsh edge may be feeding on prey you cannot even see, while the adults of the same species are hunting much larger animals in deeper water.

The Base of the Food Web: Marsh Grass, Algae and Oysters

Salt marshes line much of Bulow Creek, the Tomoka River’s lower reaches and the Intracoastal Waterway. For decades, scientists assumed that decaying marsh grass formed the base of these food webs. Research has complicated that picture. A stable-isotope study in Massachusetts’ Plum Island Estuary, presented to the Ecological Society of America, found that algae, not marsh-grass detritus, supplied most of the food for the marsh animals studied. That research was done in New England, not Florida, so it should not be assumed to apply exactly here. It does suggest that the algae on mud and shells may matter more than the grass itself.

Oyster habitat adds another layer. The Nature Conservancy notes that Florida oyster reefs shelter shrimp, blue crab, redfish and seatrout, and that newly built reefs provide both living space and food. The Guana Tolomato Matanzas National Estuarine Research Reserve, which extends into Flagler County along the Matanzas River, studies the health of local oyster populations. Not every local shoreline has oysters, marsh or seagrass, so the food available at one spot can be very different from the food a few hundred yards away.

Local Rivers, Creeks, and Estuaries: Where Fish Find Their Food

Before looking at individual waterways, it helps to understand three kinds of water that people casually lump together as “the river.”

Freshwater, Brackish and Tidal: Three Kinds of “River”

Freshwater systems have little or no salt. Lakes, ponds, blackwater creeks and the upper reaches of rivers fall into this group. Food webs here are built around aquatic insects, crayfish, snails and small freshwater fish.

Brackish creeks and transitional habitats mix fresh water draining off the land with seawater. NOAA describes brackish water as ranging from about 0.5 to 35 parts per thousand of salt, with ocean water averaging about 35. The salt level in a given spot can change daily with tides and weather.

Tidal estuaries and Intracoastal waterways are strongly influenced by the ocean. Water moves in and out with each tide, and salt-tolerant prey such as shrimp, crabs, mullet and menhaden dominate.

The local waterways described below were checked against official and published sources. None of the salinity descriptions below are based on new local measurements; where a waterway’s salt level varies, that variation is described in general terms.

The Intracoastal Waterway Behind Flagler Beach and the Matanzas River

Location: The Intracoastal Waterway runs along the west side of the barrier island that holds Flagler Beach. North of town, toward Palm Coast and Matanzas Inlet, this stretch is the Matanzas River. The GTM Research Reserve’s southern component lies along the Matanzas River and reaches into Flagler County (NOAA).

Character: Tidal and saltwater-influenced, with a mix of salt marsh, mangroves at their northern transition, and oyster habitat in parts of the system.

Likely prey: Shrimp, small crabs, mullet, other baitfish and the invertebrates associated with oysters and marsh edges.

Associated fish: Red drum, spotted seatrout, black drum, sheepshead, flounder and mullet are the estuarine species most often associated with this kind of habitat.

Access: Gamble Rogers Memorial State Recreation Area, on the barrier island at Flagler Beach, stretches from the ocean to the Intracoastal side and lists a paved boat ramp and a canoe and kayak launch for paddling the Intracoastal. Ospreys catching mullet are one of the park’s highlighted sights. North in Palm Coast, Bings Landing provides a public boat ramp on the Matanzas River with parking and restrooms.

Why it matters: This is the closest tidal water to Flagler Beach for most visitors, and it holds the classic inshore food web: shrimp, crabs, mullet and the predators that follow them.

Bulow Creek

Location: Bulow Creek runs south of Flagler Beach through Flagler and Volusia counties. It meets the Tomoka River and Halifax Creek at Tomoka Bay (Halifax River overview).

Character: The Florida Department of Environmental Protection paddling guide describes the creek as tidal, becoming brackish as it nears the Intracoastal Waterway. Much of the trail passes through grassy coastal salt marsh. The surrounding Bulow Creek State Park contains one of the largest remaining stands of southern live oak forest on the East Coast.

Likely prey: Salt-marsh habitats generally support grass shrimp, fiddler and mud crabs, and small baitfish. This is a reasonable interpretation based on habitat, not a local diet study.

Associated fish: The state paddling guide does not name fish species. Red drum, seatrout, flounder and mullet are typical of tidal marsh creeks in this region, but no published local survey for Bulow Creek was found.

Access: The DEP guide lists a boat ramp for small powerboats and paddlecraft at Bulow Plantation Ruins Historic State Park, plus access at the Walter Boardman Lane bridge and Smith Creek Landing at North Peninsula State Park. The guide also notes that park gates close at set times and that the marsh channels can be confusing to navigate, so check current hours and bring a map.

Why it matters: Bulow Creek is a good example of a “creek” that behaves like an estuary. Fishing it like a freshwater stream would miss the food web entirely.

The Tomoka River and Tomoka Basin

Location: The Tomoka River flows north for about 20 miles through Volusia County and empties into the Halifax River at Ormond Beach (Tomoka River overview). Its lower reaches pass through the Tomoka Marsh Aquatic Preserve and Tomoka State Park.

Character: Variable. The river rises in inland forest and becomes increasingly brackish and tidal toward its mouth. The exact point where fresh water gives way to brackish water shifts with rainfall and tide, and no fixed boundary should be assumed.

Likely prey: A gradient from freshwater invertebrates upstream to shrimp, crabs and estuarine baitfish downstream.

Associated fish: This is the best-documented local waterway. Tomoka State Park reports that a Florida Marine Research Institute survey recorded 90 fish species in the Tomoka River, with game fish including red drum, black drum, sheepshead, spotted seatrout, common snook and tarpon.

Access: The park lists a boat ramp, a fishing pier and dock, and canoe and kayak rentals. Nearby waters are a designated manatee sanctuary with enforced idle and slow-speed zones. The park advises paddlers to stay on the rivers and creeks and avoid the open Tomoka Basin except on very calm days, since it can turn choppy quickly.

Why it matters: The Tomoka shows the whole freshwater-to-estuary gradient in one river, which makes it a natural classroom for understanding how diet changes with salinity.

The Halifax River

Location: The Halifax River begins at Tomoka Bay, where the Tomoka River, Bulow Creek and Halifax Creek meet, and runs south about 25 miles through Ormond Beach and Daytona Beach to Ponce de Leon Inlet (overview). It is part of the Atlantic Intracoastal Waterway.

Character: A tidal lagoon, more strongly marine near Ponce Inlet and more influenced by freshwater inflow near its northern end.

Likely prey and fish: The same estuarine food web as the Intracoastal near Flagler Beach, with structure such as bridges, docks and seawalls that attract structure-oriented feeders like sheepshead and black drum.

Why it matters: It is outside Flagler County, but it connects directly to Bulow Creek and the Tomoka, so fish and prey move through the whole system.

Freshwater: Haw Creek and Crescent Lake

Location: Inland, in western Flagler County.

Character: Fresh water. Haw Creek Preserve State Park protects a blackwater creek through an old cypress swamp, and its paddling route leads to Crescent Lake. FWC describes Crescent Lake as a 15,960-acre lake in Putnam and Flagler counties.

Associated fish: Haw Creek Preserve lists speckled perch (black crappie), shellcracker (redear sunfish), largemouth bass and catfish. FWC notes that Crescent Lake anglers target bass, bluegill, redear sunfish and black crappie.

Access: Haw Creek Preserve has no boat ramp of its own. The park directs visitors to the Flagler County public ramp at Russell Landing and other nearby launches. Confirm current conditions before going.

Why it matters: This is where the insect-and-crayfish food web of Florida freshwater takes over. The rules for what fish eat here are genuinely different from those in the tidal creeks near the coast.

A Note on Access

A place to watch wildlife is not always a place where fishing is allowed, and a business’s mailing address is not necessarily where a charter departs. Parks set their own hours, fees and rules, and those change. Verify current details with the managing agency before you go, and never assume a shoreline is public or safe to wade.

What Local Fish Species Eat: Diets, Habitats, and Feeding Behavior

The species below are documented locally (for example, in the Tomoka River survey reported by Tomoka State Park or in Haw Creek Preserve’s species list) or are characteristic of northeast Florida estuaries in regional sources. Where evidence comes from outside Florida, that is noted.

Red Drum (Redfish), Sciaenops ocellatus

Habitat: Throughout the tidal zone, from marsh creeks and oyster bars to deeper channels. Juveniles typically stay near marsh grass edges and oyster reefs and move to deeper river channels in winter (SCDNR).

Natural foods: Juveniles eat opossum shrimp, grass shrimp, mud minnows and mud and fiddler crabs. Adults eat menhaden, spot, anchovies and blue crabs.

Feeding anatomy: A downward-facing (inferior) mouth with bands of teeth suits a fish that forages on or near the bottom.

What it means for you: Look for red drum where crabs and shrimp live, along marsh edges and oyster habitat, and keep offerings near the bottom.

Spotted Seatrout, Cynoscion nebulosus

Habitat: Brackish to fully marine water. The Florida Museum reports adults using seagrass beds in warm months and moving to deeper estuary pockets when water cools.

Natural foods: Copepods as larvae, mysids and shrimp as juveniles, and fish and crustaceans as adults, including anchovies, silversides, mullet, menhaden and pinfish.

Feeding anatomy: A large, upturned mouth and a pair of canine-like upper teeth support a strike-and-swallow ambush style. Adults often move into shallows on the incoming tide to feed.

What it means for you: Seatrout respond to moving, baitfish-like presentations. Their diet shifts toward fish as they grow, so larger trout are more likely to be found where schools of baitfish gather.

Black Drum, Pogonias cromis

Habitat: Bays, river mouths and lagoons, often near oyster beds, docks and bridge pilings (FWC).

Natural foods: Oysters, mussels, crabs, shrimp and fish.

Feeding anatomy: Black drum have barbels, the whisker-like projections on the chin, and powerful throat (pharyngeal) teeth for crushing shellfish.

What it means for you: FWC advises keeping bait on the bottom, where black drum feed. Structure and shell are better clues than open water.

Sheepshead, Archosargus probatocephalus

Habitat: Around pilings, docks, jetties, mangrove roots and tidal creeks. The Florida Museum notes they prefer brackish water and may even enter fresh water in winter.

Natural foods: Adults eat blue crabs, oysters, clams, other crustaceans and small fish, and scrape barnacles off hard surfaces. Juveniles eat zooplankton, worms, and midge larvae, then copepods and algae.

Feeding anatomy: Incisor-like front teeth and rows of molars crush shelled prey.

What it means for you: Sheepshead are pickers, not chasers. They nibble at structure, which is why anglers often fish for them tight against pilings.

Flounder

Florida manages four flounder species under one set of rules: Gulf, southern, summer and fringed flounder (News4Jax). They should not be treated as one species. Southern flounder (Paralichthys lethostigma) is the species most associated with low-salinity estuaries, though much of its detailed diet research comes from the Gulf of Mexico.

Natural foods: Shrimp, mullet, anchovies, croakers and menhaden. Louisiana Sea Grant reports that southern flounder tend to eat more small fish rather than shifting to larger prey as they grow.

Feeding behavior: Ambush predators. They lie camouflaged on mud or sand and strike passing prey with a large mouth and strong teeth.

What it means for you: Slow, bottom-hugging presentations near drop-offs and creek mouths imitate the prey that wanders past a waiting flounder.

Common Snook, Centropomus undecimalis

Habitat: Mangrove shorelines, seagrass, beaches and structure (FWC). Snook are documented in the Tomoka River, but northeast Florida is near the cool edge of their range. FWC notes they cannot survive water below about 60°F, and UF/IFAS researchers have documented the species expanding north on Florida’s Gulf coast as winters warm.

Natural foods: Fish and large crustaceans.

Feeding behavior: Snook face into moving water and wait for prey to drift past.

What it means for you: Snook here should be treated as an occasional, warm-season possibility rather than a dependable target.

Striped Mullet, Mugil cephalus

Habitat: Coastal and estuarine water. FWC notes juveniles move inshore at about an inch long and travel far up tidal creeks.

Natural foods: Algae, detritus and tiny organisms (FWC).

What it means for you: Mullet rarely bite conventional baits, but they are central to the food web. Seatrout, flounder and snook all eat them, and ospreys at Gamble Rogers catch them too.

Hardhead Catfish, Ariopsis felis

Habitat: Salty and brackish coastal water, occasionally fresh water, moving deeper in winter (Louisiana Sea Grant). This is regional evidence; no specific local survey was reviewed.

Natural foods: Almost anything: worms, snails, clams, shrimp, crabs and small fish.

What it means for you: A hardhead on a shrimp is common in many Florida estuaries. It is not the same as a freshwater catfish, and its spines deserve careful handling.

Florida Bass, Micropterus salmoides

FWC now recognizes the bass of most of Florida as Florida bass, a species separate from the northern largemouth bass, though the two are treated as one for regulations (FWC). Most anglers still call it largemouth bass.

Habitat: Lakes and rivers, along vegetation and structure. Haw Creek and Crescent Lake are the relevant local waters.

Natural foods: Zooplankton when tiny, small fish from about an inch long, and as adults a wide variety of fish, crustaceans and larger insects (FWC).

What it means for you: A large mouth and opportunistic habits make bass responsive to baitfish, crayfish and frog-style presentations near cover.

Bluegill and Redear Sunfish

Bluegill (Lepomis macrochirus) and redear sunfish, known locally as shellcracker (Lepomis microlophus), are separate species. FWC notes that bluegill mainly eat insects and their larvae and spawn in shallow summer “beds.” Redear are widely nicknamed shellcracker for their habit of crushing snails. Both belong to freshwater habitats like Haw Creek and Crescent Lake.

What it means for you: Small hooks and natural baits such as crickets, worms and grass shrimp fit the small mouths and insect-based diets of sunfish. This is the clearest example of a freshwater, insect-driven food web in the area.

Freshwater Catfish

Haw Creek Preserve lists catfish without naming the species, so this guide does not assign one. Several catfish species occur in Florida fresh water, and their diets vary.

Species Comparison at a Glance

Species	Relevant habitat	Main natural foods	Feeding behavior	Practical takeaway
Red drum	Marsh edges, oyster bars, tidal creeks	Shrimp, crabs, small fish	Bottom forager	Fish low near crab and shrimp habitat
Spotted seatrout	Brackish to marine, grass flats, deeper pockets	Shrimp when young; fish as adults	Ambush strike, moves in on rising tide	Moving, baitfish-style presentations
Black drum	Oyster beds, docks, pilings	Oysters, mussels, crabs, shrimp	Bottom feeder with barbels	Keep bait on the bottom near shell
Sheepshead	Pilings, docks, tidal creeks	Crabs, barnacles, oysters, clams	Picks at structure	Fish tight to hard structure
Southern flounder	Mud and sand bottoms, creek mouths	Shrimp, small fish	Camouflaged ambush	Slow, bottom-hugging retrieves
Common snook	Warm shorelines, structure	Fish, large crustaceans	Waits facing current	Occasional warm-season target
Striped mullet	Tidal creeks, lagoons	Algae, detritus	Grazing	Key prey for predators
Florida bass	Lakes, blackwater creeks	Fish, crayfish, insects	Ambush near cover	Freshwater only around here
Bluegill and redear	Lakes, ponds, creeks	Insects, larvae, snails	Small-mouthed pickers	Small hooks, natural baits

How Tides, Rainfall, Seasons, and Habitat Change Fish Diets

Knowing what a fish can eat is only half the picture. What it actually eats on a given day depends on what is available, where it is concentrated and whether the fish is inclined to feed.

Rain Moves the Salt Line

Freshwater inflow is what dilutes seawater and creates brackish conditions, according to NOAA. Heavy rain sends more fresh water into creeks like Bulow and the Tomoka, which can push lower salinities farther downstream. Because prey animals tolerate salt differently, a sustained rainy period can shift where shrimp, crabs and baitfish are found, and predators may follow. Some species, such as southern flounder and sheepshead, tolerate fresh or nearly fresh water; others prefer saltier water. No local salinity data were reviewed for this guide, so treat this as general estuarine biology applied to local conditions.

Tides Deliver and Concentrate Prey

Tides act like a conveyor belt. A rising tide floods marsh grass and lets small fish, shrimp and crabs move into shelter. A falling tide drains them back out through creek mouths and cuts. Spotted seatrout move into shallows with the incoming tide to feed, according to the Florida Museum, and snook position themselves facing moving water to intercept drifting prey (FWC). The edges where water moves fastest often concentrate the most food.

Available Prey Is Not the Same as Willing Fish

A creek full of shrimp does not guarantee fish that want to eat. Feeding depends on temperature, light, water clarity, recent meals, spawning condition and predator risk. Anglers often find fish holding near abundant prey but ignoring it, then feeding in a short burst when the tide turns or light changes.

Temperature Changes Activity, Not Just Location

Temperature affects how much and where fish feed, though no single number applies to every species. Some documented examples:

• Southern flounder feeding peaked between roughly 61 and 77°F in Gulf research (Louisiana Sea Grant).
• Juvenile red drum move to deeper river channels in winter (SCDNR).
• Seatrout shift from grass flats to deeper pockets as water cools.
• Snook cannot tolerate water below about 60°F (FWC).

Turbidity and Light Shape Hunting Strategy

Fish that hunt by sight and fish that hunt by touch or smell respond differently to murky water. In Galveston Bay, southern flounder ate more shrimp when the water was muddy, according to Louisiana Sea Grant. Black drum carry chin barbels, which suggests that sensing food along the bottom matters for them. Bass tend to feed early and late in the day near vegetation, according to the Chesapeake Bay Program. Low light can favor ambush hunters, while clear, bright water may push them to deeper or shadier cover.

Habitat Edges Offer Different Menus

A marsh edge, a creek mouth, an oyster bar and a deep channel each offer different food:

• Marsh edges hold grass shrimp, fiddler crabs and small fish, which is where juvenile red drum forage.
• Creek mouths funnel prey out on a falling tide.
• Oyster habitat harbors crabs and shrimp and feeds shell-crushers such as black drum and sheepshead.
• Deeper channels provide winter refuge for juvenile red drum and cooler-weather trout.

Overlooked Detail 1: The Marsh May Run on Algae More Than Grass

As noted earlier, research at Plum Island Estuary in Massachusetts found algae, not decaying marsh grass, supplied most of the diet of the marsh animals studied. If the same holds in Florida marshes, the film of algae on mud and shells could be the true engine behind the shrimp and crabs that red drum eat. That is an open question here, not a local finding.

Overlooked Detail 2: An Insect Link Inside a Saltwater Food Web

Freshwater insect patterns usually do not apply in tidal creeks, but there is an interesting exception. Young sheepshead eat midge (chironomid) larvae, according to the Florida Museum. The insect-larva link persists even in a fish that will later crush barnacles and oysters.

Overlooked Detail 3: Flounder Don’t “Size Up” Their Prey

Most predators eat larger prey as they grow. Southern flounder appear to be an exception: Louisiana Sea Grant reports they tend to take more small fish rather than larger ones. Small, natural-sized presentations may suit them better than big baits, though this is based on Gulf research.

Overlooked Detail 4: The Fall Mullet Run Moves a Food Supply

Each fall, adult striped mullet leave rivers and estuaries in schools and head offshore to spawn (Hoodline). Because many predators eat mullet, this seasonal movement redistributes a major food source along the coast. It is a reminder that diets change with the calendar, not only with the tide.

Overlooked Detail 5: Few Inlets Means a Long Trip for Ocean Water

Flagler Beach sits between Matanzas Inlet to the north and Ponce de Leon Inlet to the south, with no ocean inlet in between. A reasonable interpretation is that ocean water exchanges more slowly in the middle stretches of the Intracoastal than near the inlets, which may make freshwater runoff relatively more influential after heavy rain. No local measurements were reviewed to confirm this, so treat it as a hypothesis worth asking a local captain about.

Using Local Fish Diets to Plan a Better Fishing Trip

Understanding diet turns guesswork into a plan. The goal is not to guarantee a catch, which no one can do, but to make decisions that match how local fish actually feed.

Identify the Habitat Before Choosing a Species

Start by asking what kind of water you are fishing. Fresh, brackish or tidal? Mud, sand, shell or grass? Moving or still? A blackwater creek in western Flagler County calls for freshwater species and tactics. A marsh creek off the Intracoastal calls for redfish, trout and flounder thinking. For an overview of local trip types, contact us today.

Match Your Presentation to a Real Food Source

Once you know the habitat, think about the prey that lives there:

• Shrimp-rich marsh edges: live or imitation shrimp near the bottom for red drum and flounder.
• Baitfish schools: moving, minnow-style lures or live baitfish for seatrout.
• Oyster bars and pilings: crab or shellfish baits for black drum and sheepshead.
• Freshwater cover: crayfish, minnow or frog imitations for bass; small natural baits for sunfish.

Behavior Matters as Much as Bait

How you present matters as much as what you present. Ambush predators like flounder want something that moves past slowly. Snook face the current and wait for food to drift to them. Sheepshead pick at structure. Matching the fish’s feeding style often matters more than matching the exact prey species.

Questions to Ask a Charter Captain

A good captain can translate current conditions into a plan. Useful questions include:

• Which species are realistic targets this week, and why?
• Are we fishing tidal, brackish or fresh water?
• How has recent rain changed things?
• Which tide stage are we planning around?
• What bait or lures will we use, and what natural prey do they imitate?
• What should beginners or kids expect on this trip?

Ask about available guided trips today!

What Beginners and Families Should Expect

Fishing is unpredictable. Some trips produce steady action; others are slow despite good planning. Families often enjoy trips that combine fishing with wildlife viewing, since the same marshes that hold fish also hold herons, egrets, ospreys and sometimes manatees. Expect to spend time watching the water, learning about the tide and handling bait. Those moments are part of the experience.

When a Guide Helps

Water that looks promising is not always productive. A guide who fishes the area regularly may know which marsh edges hold prey on a given tide, where fresh water has pushed baitfish after a storm, and which spots have gone quiet. That local knowledge is hard to build on a short visit. For seasonal patterns, view here.

Rules, Licenses and Protected Areas

Harvest rules, bag and size limits, closed seasons, bait restrictions and license requirements vary by species, region and water type, and they change. Flagler County falls within FWC’s Northeast region for red drum management (FWC red drum regulations). Florida’s flounder harvest has been closed each year from mid-October through November (News4Jax), so confirm current flounder rules before keeping one. Check the FWC saltwater license page and FWC’s freshwater fishing pages before you go. Manatee zones, aquatic preserves and park rules may also apply.

Frequently Asked Questions

Do river fish eat insects?

Yes, especially in fresh water. Bluegill mainly eat insects and larvae, and young bass and sunfish rely on them. In tidal water, insects play a smaller role, though juvenile sheepshead eat midge larvae.

Do river fish eat plants?

Some do. Striped mullet graze on algae and detritus, and young sheepshead eat algae. Most game fish around Flagler Beach are predators that eat animals rather than plants.

What do small river fish eat?

Mostly tiny animals. Larval seatrout and red drum eat zooplankton such as copepods, then move on to small shrimp, crabs and minnows. Young Florida bass start on zooplankton before switching to small fish.

Do freshwater and saltwater fish eat the same things?

Not usually. Freshwater fish rely more on insects, crayfish and freshwater minnows. Estuarine fish rely on shrimp, crabs, mullet and other salt-tolerant prey. Brackish water is where the two menus overlap.

Is shrimp suitable for every type of river fishing?

No. Shrimp work well in tidal and brackish water because they are natural prey there. In a freshwater lake or blackwater creek, worms, crickets, minnows or crayfish imitations generally match the local food web better, although FWC notes grass shrimp can work for bedding bluegill.

How does rain affect feeding around Flagler Beach?

Rain adds fresh water, which can lower salinity in creeks and the Intracoastal. That can shift where prey gather and where predators feed. How much it matters depends on how much rain fell, the tide and the location.

The Bottom Line

So, what do river fish eat around Flagler Beach? In the tidal creeks and Intracoastal, they eat shrimp, crabs, mullet, oysters and small fish, all supported by algae and the life on marsh edges and shell. In the freshwater creeks and lakes inland, insects, crayfish and small fish take over. The key is recognizing which kind of “river” you are on, then matching your approach to how the fish there actually feed.