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.
What do goldfish eat besides goldfish flakes? Since Goldfish are omnivouros, they can eat a wide variey of food such as brine shrimp, earth worms, lettuce, de-shelled peas, oranges, krill, daphnia, tubifex worms, elodea, â¦duckweed, blood worms, and other shrimps. However, Goldfish flakes provide the important nutrients your goldfish needs on a daily basis.