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.
Smaller fishes and crustaceans may become Porcupine Puffer dinner. So that eliminates them as a choice for the reef tank setup. Porcupine Puffer Fish eat crustaceans in the wild and will accept most types of marine fish food including frozen, freeze dried, vitamin enriched flakes and live foods.Small pieces of fresh shrimp and clam can be chopped up and given.Give them a variety of foods but mostly meaty items for optimal health.nything smaller could become puffer snacks. Not suitable for a reef tank setup. Fish Disease: Saltwater Fish Disease-Diagnose, Symptoms and Treatment. Diet / Foods: Porcupine Puffer Fish like to eat crustaceans so frozen meaty marine cubes work well as well as small pieces of fresh shrimp.