krill- shrimp-like planktonic crustaceans; major source of food for e.g. baleen whales opossum shrimp- shrimp-like crustaceans whose females carry eggs and young in a pouch between the legs isopod- any of various small terrestrial or aquatic crustaceans with seven pairs of legs adapted for crawl...
In the decapods there are three sets of paired maxillipeds. In the copepods the maxillipeds are followed by four pairs of swimming legs; a fifth pair is sometimes highly modified for reproductive purposes and is sometimes reduced to a mere vestige. Behind the decapod maxillipeds there are five...
sessileanimalwhose soft body is contained within a cavity protected by an outer wall. This wallcomprisesan even number of calcareous plates cemented to the substratum. An opening at the top can be closed by two pairs of plates (an operculum) through which feathery, jointed legs (cirri) can ...
Crustaceans are generally aquatic and differ from other arthropods in having two pairs of appendages (antennules and antennae) in front of the mouth and paired appendages near the mouth that function as jaws. Because there are many exceptions to the basic features, however, a satisfactory ...