EVERYDAY SCIENCE

Detailed explanation-1: -Crustaceans (subphylum Crustacea) are members of the phylum Arthropods, including crabs, lobsters, crayfish, prawn, shrimp, krill, barnacles, woodlice and beach fleas. The most common types of crustaceans are shrimp and crab.

Detailed explanation-2: -Crabs, lobsters, shrimps, and wood lice are among the best-known crustaceans, but the group also includes an enormous variety of other forms without popular names.

Detailed explanation-3: -Class Malacostraca – lobsters, crayfish, crabs, shrimps, amphipods, isopods (including pillbugs and sowbugs), ad mantis shrimps.

Detailed explanation-4: -Crustaceans are aquatic animals that have jointed legs, a hard shell and no backbone, such as crab, crayfish, lobster, prawns and shrimp. Most molluscs have a hinged two-part shell and include clams, mussels, oysters and scallops, as well as various types of octopus, snail and squid.

Detailed explanation-5: -Crabs belong to the subphylum Crustacean, the largest group of marine arthropods, which also includes lobster, shrimp, and krill, a shrimp-like crustacean. Crabs move sideways, walking on four pairs of legs, and holding their two legs with claws away from their body.