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Summer Flounder

Summer flounder, commonly known as fluke, is a bottom-dwelling flatfish in the flounder family (Paralichthyidae). It is one of the most targeted inshore and nearshore species along the U.S. Atlantic coast due to its size, availability, and food quality. Summer flounder occupy near-bottom zones and are closely tied to sandy substrate, depth changes, and seasonal water temperature shifts.

Scientific Classification

  • Family: Paralichthyidae
  • Genus: Scomberomorus
  • Species: Pomatomus saltatrix

Summer flounder are distinct from winter flounder and other right-eyed flounders based on body shape, eye placement, and migration patterns.

Identification and Physical Characteristics

Summer flounder have a flattened, oval-shaped body adapted for life on the seafloor. Both eyes are located on the left side of the head, allowing the fish to lie camouflaged against the bottom while watching for prey. The mouth is large with sharp teeth, extending well past the eyes.

Coloration varies widely to match bottom conditions, ranging from sandy brown to olive or gray, often with darker mottling. This ability to change coloration provides effective camouflage against predators and prey.

Size, Weight, and Growth

Adult summer flounder commonly measure between 18 and 30 inches in length. Larger individuals can exceed 35 inches and weigh more than 20 pounds, with females growing significantly larger than males.
 
Growth is relatively fast during early life stages, and larger fish are typically found in deeper or offshore waters.

Distribution and Range

Summer flounder are distributed along the western Atlantic coast, ranging from the Gulf of Maine to Florida. Their presence in any given area is strongly seasonal.

They migrate offshore to deeper water during winter and return to inshore and nearshore environments during spring, summer, and fall.

Habitat Preferences

Summer flounder favor sandy and mixed-bottom environments and are most commonly found in:

  • Sandy flats and channels
  • Nearshore coastal waters
  • Inlets and bays
  • Offshore sandy bottom and edges

They typically bury themselves in the substrate, positioning near drop-offs and structure where prey moves through.

Behavior and Movement

Summer flounder are ambush feeders that rely on concealment rather than movement. They remain stationary for long periods, striking when prey passes within range.

Seasonal migrations are pronounced, with large-scale offshore movement occurring in colder months and inshore return as waters warm.

Diet and Feeding Strategy

Summer flounder feed on a wide variety of bottom-oriented and mid-water prey. Common food sources include:

  • Small fish
  • Crabs
  • Shrimp
  • Squid
They attack prey from below or the side, using quick upward strikes rather than pursuit.

Importance to Fisheries

Summer flounder support major recreational and commercial fisheries along the Atlantic coast. They are highly valued for their mild, white flesh and are commonly prepared fresh, fried, or baked.

Due to fishing pressure, they are managed under strict regulations including size limits, bag limits, and seasonal controls.

Fishing for Summer Flounder

Summer flounder are targeted using bottom rigs, jigs, and drifting presentations with live or artificial bait. Success depends on covering productive bottom and maintaining contact with the seafloor.

Boat drift speed, depth control, and bait placement are critical factors.

The Fight

Once hooked, summer flounder rely on steady resistance and head shakes rather than speed. The fight is characterized by weight and leverage, especially near the surface where fish may resist being lifted from the bottom.