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.
Rating Newest Oldest. Best Answer: In nature they eat mainly insects, and some plants/algae. You should feed them a standard tropical fish flake with fish/worm/insect as the main ingredient, and some sort of plant or vegetable. Avoid pellets, food for bottom feeders, and specialized foods. Roll large flakes in your fingers to break them up into bite sized pieces. Try and feed them small amounts twice a day.