copula - an equating verb (such as `be' or `become') that links the subject with the complement of a sentence. copulative, linking verb. verb - a content word that denotes an action, occurrence, or state of existence.
Different species of crabs eat different foods. Depending on the species, they may eat plankton, worms, shrimps, prawns and other shellfish, and they scavenge for animal and/or plant remains. 1  They are detrivores. 2  They will consume animal as well as plant matter (algae, etc.).
The crabs live up to 20 years with only the male crabs caught for commercial use. Snow crabs feed on bottom-dwelling sea life, including bivalves, brittle stars and crustaceans, including their own species. They also eat worms, gastropods and several varieties of small fish.