Wiktionary(0.00 / 0 votes)Rate this definition: upthrust(Noun) an upward thrust. upthrust(Noun) buoyancy. upthrust(Noun) an upward movement of part of the Earth's crust. upthrust(Verb) to thrust something upwards.
Predators, Food and Feeding: Natural predators of winter flounder include sharks, oyster toadfish, summer flounder, striped bass, monkfish and spiny dogfish. When feeding, a winter flounder will lie motionless, partly concealed on the bottom, with its head raised off the bottom, braced by the dorsal fin.
Preheat oven to 400 degrees F (200 degrees C). Lightly grease a large, shallow baking dish. Arrange flounder fillets on prepared baking dish and brush with 1 tablespoon butter. Combine remaining 3 tablespoons butter with bread crumbs, Parmesan cheese, salt, pepper, and thyme in a bowl; sprinkle over flounder. Bake in preheated oven until fish flakes easily with a fork, 15 to 20 minutes. Carefully transfer fillets to a plate with a spatula.