🎣 Species Targeting Guide: Summer Flounder (Fluke)¶

Scientific name: Paralichthys dentatus Also known as: Fluke, Doormat (large specimens) Guide last updated: 2026-05-24 Author / source: Maryland Fishing Guides

1. Species Overview¶

Field	Details
Family	Paralichthyidae
Typical size	14–24 inches / 1–4 lbs
Trophy size	5+ lbs ("doormat") — 24"+ fish
Average lifespan	12–14 years
Water type	Salt / brackish
Native range	Western North Atlantic — Nova Scotia to Florida; common Mid-Atlantic
Conservation status	Managed; federally regulated through ASMFC/NOAA — annual quota adjustments common

Identifying features: Flatfish with both eyes on the LEFT side of the body (left-eyed flounder). Mottled brown/gray/tan topside with pale white underside. Five prominent ocellated (eye-like) spots arranged in a loose "X" pattern on the upper body — a key field mark. Wide, toothy mouth extends to below the eye. Broad, flat profile; relatively large caudal and dorsal fins.

Easily confused with: Southern flounder (Paralichthys lethostigma) — very similar, also left-eyed, but typically lacks the defined ocellated spots and has a slightly more elongated body; uncommon but possible in Maryland coastal waters. Windowpane flounder (Scophthalmus aquosus) — much thinner body, very large mouth, translucent flesh visible; same general habitat but smaller and not a target species.

2. Habitat & Where to Find Them¶

Preferred structure: Sandy or muddy bottom adjacent to channel edges, drop-offs, inlet jetties, nearshore wrecks, artificial reefs, bridge pilings, grass flat edges, and current seams. They bury themselves in bottom sediment and ambush passing prey.
Depth range: 2–60 feet depending on season. Back bay shallows (2–12 ft) in spring/early summer; inlet and nearshore structure (10–40 ft) through mid-summer; offshore wrecks and reef sites (20–60 ft) in peak heat and fall migration.
Water temperature range: Active 60–75°F (15–24°C); peak feeding 65–72°F (18–22°C). Move to deeper, cooler water when bay shallows exceed ~78°F.
Water clarity preference: Tolerates murky to semi-clear; often found in the slightly murky, sediment-rich water of tidal channels and back bay cuts. Clear water over sandy nearshore bottom also holds fish near structure.
Current / flow: Strong tidal current is key. Flounder position themselves at the downcurrent edge of structure and ambush prey swept by the flow. Moving tide — especially incoming and outgoing — is far more productive than slack tide.
Cover & ambush points: Jetty rock edges at Ocean City Inlet, channel bends in Sinepuxent and Isle of Wight bays, bridge shadow lines, edges of submerged grass beds, undercut banks of tidal creeks, and hard bottom patches near the Ocean City reef sites.
Bottom composition: Sandy and muddy bottom preferred; mixed sand/shell near inlet; sandy/silty bottom in back bays.

Local hotspots / GPS marks: - Ocean City Inlet — both jetties, especially the south jetty rock edges; heavy current concentrates baitfish and flounder. - Sinepuxent Bay — channel edges south of Rt. 50 bridge; the cuts running parallel to Assateague Island. - Isle of Wight Bay — deeper channel bends, the "Crabbin' Bridge" area, and the docks along the bay side of Ocean City. - Assawoman Bay — tidal creek mouths and channel edges in the northern sections. - Ocean City Reef Sites / "The Bass Grounds" — offshore (8–12 miles) during summer peak; trolled and drifted over structured bottom. - Lower Chesapeake Bay — mouth of the bay near the Bay Bridge Tunnel area and Tangier Sound channel edges; less common but present.

3. Seasonal Patterns¶

Season	Behaviour	Location	Best tactic
Spring	Migrate inshore from offshore wintering grounds; feeding aggressively to recover after winter; fish arrive May, run picks up through June	Ocean City Inlet, backs of coastal bays, Sinepuxent Bay shallows	Slow drift with bucktail + Gulp! on bottom; bait rigs with squid/minnow combos
Summer	Active but shift to cooler, deeper water as back bays warm past 78°F; early summer excellent in bays, mid-summer focus shifts to inlet and offshore structure	OC Inlet, nearshore reef sites, Bass Grounds (offshore), deeper bay channels	Drift over wrecks/reefs with squid strip + Gulp!; bucktail jigging in inlet current
Autumn	Begin out-migration toward offshore wintering areas; feeding heavily pre-departure; some of the largest fish caught September–October	OC Inlet, nearshore structure, channel mouths; fish stage near the inlet before heading out	Larger baits and lures; drift and slow-retrieve bucktails; excellent catch rate in September
Winter	Absent from inshore Maryland waters; offshore in deeper Atlantic water 60–120 ft	Offshore Atlantic — beyond normal recreational range	Not a viable inshore target; some taken on party boats working deeper structure

Spawning season: Late October through January offshore; not occurring in Maryland inshore waters. No closure needed for inshore fishery, but fall fish are pre-spawn — handle with care and release oversized fish quickly.
Peak feeding windows: Incoming tide in spring (May–June) in back bay channels; any moving tide at the inlet all season; falling tide over nearshore reef sites in summer; aggressive pre-migration feeding in September.

4. Timing & Conditions¶

Time of day: Dawn through mid-morning and the last two hours before dark are most productive. Midday can be slow in summer heat. Overnight tidal flows in the inlet can be excellent for large fish.
Tide: Moving tide is critical. The first two hours of the outgoing tide and the first two hours of the incoming tide are peak windows. The strong current in the OC Inlet on the outgoing tide is a classic flounder time. Low and high slack are the slowest periods.
Moon phase: Full and new moon produce stronger tidal currents, which concentrates bait and triggers flounder feeding. Quarter moons produce moderate tides and consistent action.
Barometric pressure: Stable or slowly rising pressure produces the best bite. A sharp pressure drop before a front often kills the bite; post-front clearing with rising pressure is very good.
Weather triggers: Overcast days can keep fish active throughout the day rather than only at dawn/dusk. A moderate southwest wind (prevailing summer wind) creates good drift conditions in the bays. Dead-calm flat days in mid-summer can be slow.
Light conditions: Low-light conditions (dawn, dusk, overcast) extend feeding windows, especially in the clear shallower bays. Bright midday sun pushes fish tighter to structure and into deeper cuts.

5. Diet & Feeding Behaviour¶

Natural prey: Silversides (spearing), bay anchovies, killies/mummichogs, small spot, small croaker, sand lance, squid, small crabs, shrimp.
Feeding style: Classic ambush predator — lies motionless on or partially buried in the bottom, then explodes upward to engulf prey passing overhead. Often chases prey a short distance before turning it and swallowing head-first.
Seasonal forage shifts: Spring and early summer: silversides and bay anchovies are abundant in back bays — match with small white or chartreuse soft plastics. Mid-summer: squid and sand eels on offshore structure — use squid strips and longer paddle-tail plastics. Fall: larger baitfish (small spot, small croaker, mullet) — upsize presentations.
Match-the-hatch notes: In the back bays, 3–4" white or natural-colored Gulp! Swimming Mullet or Gulp! Shrimp on a 3/8–1 oz white or chartreuse bucktail is a near-perfect match for the abundant silverside/anchovy forage. Add a teaser dropper of a small white Clouser or a spinner blade for extra flash. In the inlet with heavy current, go heavier (1–2 oz bucktail) to stay on the bottom.

6. Tackle & Gear¶

Rod¶

Length / power / action: 6'6"–7'6" medium-light to medium spinning rod, fast action. A 7' medium fast is the versatile workhorse for back bay and inlet drifting. For heavier inlet/offshore work, a 7' medium conventional is preferred by many charter captains.

Reel¶

Type & size: Spinning 3000–4000 size (Shimano Stradic, Penn Battle, Daiwa BG) for back bay work. Conventional/levelwind 2/0–3/0 for heavier inlet/offshore drifting.

Line¶

Main line: 10–20 lb braided line (PowerPro, SpiderWire Stealth) — thin diameter cuts current, maintains bottom contact, provides excellent feel.
Leader: 20–30 lb fluorocarbon, 18–36 inches. Fluorocarbon is preferred for its low visibility and abrasion resistance against the flounder's small sharp teeth. Barrel swivel connection to main braid.

Terminal tackle¶

Hooks: Wide-gap offset worm hooks #1/0–3/0 for Gulp! presentations; Kahle hooks #1/0–2/0 or long-shank bait hooks #1–2/0 for strip bait/minnow rigs. Flounder often chew and swallow — use larger hooks to reduce deep hooking.
Sinkers / rigs: Bank sinkers or bullet-head jig heads 3/8–2 oz (match to current speed — stay on the bottom). Bucktail jig 3/8–1.5 oz with dressed hook. High-low (two-dropper) bait rig with sliding egg sinker for natural bait presentations. Fluke/flounder spreader rig for two-hook bait setup.
Other: Barrel swivel (size 3–5) at leader connection; optional spinner blade (Colorado #3 gold or silver) on teaser dropper loop above main jig for added flash; small plastic squid skirt in white/chartreuse as teaser.

7. Baits & Lures¶

Best natural baits¶

Squid strip + live/dead minnow combo ("flounder sandwich") — cut a thin strip of fresh squid 4–6" long and hook it through the jig hook along with a killfish, spearing, or small spot. This dual-offering is the most consistent natural bait rig for Maryland flounder. Best all-season; excel when fish are finicky.
Live killfish (mummichog/killie) — hooked through the lips or just behind the dorsal fin on a simple jig head or flounder rig. Superb in the back bays and channels where killie populations are dense. Very effective spring through early summer.
Bloodworms / sandworms — work well for smaller flounder and pan-sized fish, especially from jetties and piers. More of a croaker/spot bait, but flounder absolutely eat them.
Whole fresh squid — on a long-shank hook with the body slit open to release scent; excellent in the inlet and offshore on wrecks.

Best artificial lures¶

Lure type	Size / colour	Conditions	Retrieve
Gulp! Swimming Mullet on bucktail	3"–4" white, chartreuse, or new penny on 3/8–1 oz white/chartreuse bucktail	Back bay drifting, inlet current, light-moderate wind	Drift with current; bounce bottom with short 6–8" hops; pause to let it settle
Gulp! Shrimp or Grub on jig head	3" white, pink, or motor oil on 1/4–1/2 oz jig	Shallow back bay, calm conditions, lighter current	Slow drag-and-hop along bottom; dead slow retrieve with occasional lift
Paddle-tail soft plastic	4"–5" white/silver or chartreuse on 3/4–1.5 oz jig head	Inlet, offshore reef and wreck drifting in heavier current	Drift and bounce; short lifts to imitate fleeing baitfish
DOA Shrimp / curly tail grub	3" white or green	Shallow grass flat edges, clear water	Very slow crawl along bottom with occasional short hops
Clouser Minnow (fly)	Size 2–4, white/chartreuse or white/olive, 2–3"	Shallow back bay flats, clear water, light tackle fly approach	Weighted fly stripped along bottom with short, sharp strips

8. Techniques & Presentation¶

Primary techniques: Drift fishing the bottom is the signature flounder method. Position the boat uptide/upwind of a productive channel edge, drop-off, or structure, and drift with the current, maintaining bottom contact with bucktail jigs or bait rigs. Vary drift speed by adjusting boat angle with the motor. Anchor-and-soak with natural bait is effective from jetty rocks and piers. Light jigging vertically is used over offshore wrecks from a drifting boat.
Retrieve / action: Drift the jig/bait along the bottom with short, sharp hops — lift the rod tip 8–12", pause 2–3 seconds, let it settle back down. The pause is critical; flounder often grab the bait on the fall or when it's stationary. Don't rush. Maintain constant bottom contact — if you're not occasionally ticking bottom, go heavier.
Hook-set: This is where new anglers get it wrong. Flounder grab the bait, chew it sideways to reposition it head-first, then swallow. When you feel the initial tap or tug, LOWER the rod tip, feed line for 3–6 seconds, then drive a firm, downward hook-set. Setting too early is the #1 mistake. The hook-set should be a sharp, definitive sweep toward the bottom — not an upward bass-style set.
Fighting the fish: Flounder don't run or leap. They fight by turning their broad, flat body sideways to use maximum resistance against the current. Keep steady pressure, avoid a slack line (they can spit the hook), and don't horse them. Use a net for fish over 18" — lipping a flounder's toothy mouth over the side of the boat risks dropping the fish.
Common mistakes to avoid: Setting the hook on the first tap (most common — wait for the run or the weight); not maintaining bottom contact (lure is too light for the current); using too heavy line (braid over 20 lb and heavy fluoro kills the action in light current); drifting too fast (ideal drift speed is 0.5–1.5 mph over the bottom).

9. Regulations & Ethics¶

⚠️ Always confirm current local regulations before fishing — these change.

Legal size limit: Maryland coastal flounder (including Ocean City and coastal bays) are subject to the Atlantic States Marine Fisheries Commission (ASMFC) Interstate Fishery Management Plan. Minimum size limits have historically been in the 17"–19" range and are set annually. Confirm the current minimum with the Maryland DNR before each season — it changes. A size limit this high means most fish caught will be released.
Bag / possession limit: Typically 10 fish per person per day for recreational anglers, but subject to annual adjustment. Charter/party boat limits may differ. Confirm with MD DNR.
Closed seasons: The recreational fishery typically runs from approximately late May through late October, with specific dates set annually. Confirm the current season with MD DNR.
Licence required: Yes — a Maryland Tidal Sport Fishing License is required. Available from MD DNR or licensed agents. Non-residents require a non-resident license. Free for anglers under 16 and certain seniors.
Gear restrictions: No general gear restrictions for recreational anglers beyond hook size in specific areas. Review any closures around Assateague National Seashore areas. Federal regulations also apply in federal waters (beyond 3 miles).
Catch & release notes: Given the significant size limit, expect to release the majority of flounder caught. Wet your hands before handling. Do not hold fish vertically by the gill plate for photos — support the body horizontally. Revive fish in the water by gently moving them forward and back before release. Flounder released from moderate depths (under 40 ft) do not typically need venting.

For current regulations, visit the Maryland DNR Fisheries Service: marylandspecialreports.com or dnr.maryland.gov/fisheries

10. Handling, Safety & Eating¶

Handling: Always wet your hands before touching a flounder. Grip fish firmly across the body just behind the pectoral fins or use a rubber-mesh landing net. For catch-and-release, keep the fish horizontal and minimize air exposure.
Hazards: Flounder have a full set of small but very sharp teeth — do not blindly reach into the mouth. The gill plates have sharp edges. Use needle-nose pliers or a dehooker for hook removal rather than fingers. No venomous spines.
Best eating?: Yes — one of the finest-eating fish in Maryland coastal waters. The flesh is white, mild, delicate, and firm. Highly prized; often called the best-tasting fish in the back bays.
Preparation: Kill and bleed immediately by spiking the brain (iki jime) or a clean cut through the gills. Place immediately on ice. Flounder yields two large top fillets and two smaller bottom (white-side) fillets. The skin pulls off easily and can be left on or removed. Pan-fried, broiled, or stuffed flounder are Maryland classics. Fresh flounder does not benefit from long marinating — a simple preparation of butter, lemon, and Old Bay showcases the flavor perfectly.

11. Notes & References¶

Maryland DNR Fisheries Service — fishing regulations and license info: dnr.maryland.gov/fisheries
ASMFC Summer Flounder Management Board — annual size/bag limit updates: asmfc.org
Ocean City, MD charter fleet reports — Talbot Street Pier and OC Marina departure boards for real-time scouting
"Fluke University" community forums and the Coastal Fishing Reports section of The Fisherman Magazine (Mid-Atlantic edition) for seasonal intel
Berkley Gulp! product guide for fluke — tip/tail/color selection reference
Personal note: The OC Inlet south jetty on a strong outgoing tide in late September produces some of the largest doormat flounder of the year. Work the bucktail tight to the rocks.