Anglers in the lower Hudson and New York Harbor know this fish by the name fluke. It is a popular game fish, reaching a weight of two to five pounds and a length of two feet. Large individuals are called doormats.
Summer flounder are brown, gray, or olive-colored above, often with darker spots. Their large mouths are filled with sharp teeth, and fluke are active predators, often swimming well above the bottom while chasing small fish.
As one might guess from the name, summer flounder are most common here in the warm months.