Larger carnivores feed voraciously on them. Herring, for example, may consume thousands of the tiny creatures in a single day. Anchovies and all fish larvae are primarily zooplankton feeders. Adult striped bass, bluefish and weakfish feed mainly on other fish. Striped bass and other predators may also feed upon young of their own species.
Many fish are omnivorous, eating both plants and animals.
Omnivores, like eels and croakers, feed on planktonic copepods, amphipods, crabs, shrimp, small bivalves and small forage fish.