Nutrition
Because the winter flounder is mainly a bottom dwelling fish, its main diet consists of things it can find on the sea floor. Larval flounders will feed on the eggs and larva of many types of invertebrates. The adults will feed on small mollusks, crustaceans, other small fish, plant matter, and some echinoderms. However, this fish isn't the only predator on the block.
Here is a video showing a winter flounder feeding on algae growing on rocks.
This video shows a flounder moving amongst sand dollars in what is believed to be its "hunting mode"