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.).
Meat and Protein. Hermit crabs need protein-rich foods every day. Most of their daily protein should come from meat or fish -- you can feed lean beef, chicken or turkey, salmon, tuna, shrimp and eggs,which can be hard-boiled or scrambled. Fish can be fresh or freeze-dried; consider krill and plankton.