NEET BIOLOGY

Detailed explanation-1: -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.

Detailed explanation-2: -Crustaceans are a very diverse group of invertebrate animals which includes active animals such as the crabs, lobsters, shrimp, krill, copepods, amphipods, and more sessile creatures like barnacles. Arthropoda is the largest phylum of Animal Kingdom. It includes about 11, 340, 000 species in all habitats.

Detailed explanation-3: -Crabs and crayfish are crustaceans, a subdivision of arthropods – the large group of animals without backbones (invertebrates) that includes insects, spiders, mites, scorpions and springtails. Arthropods have jointed legs and a hard outer shell that acts as a skeleton.

Detailed explanation-4: -Crabs are neither amphibians nor reptiles; they are crustaceans. Crustaceans are semi-aquatic creatures that have exoskeletons. This group includes crabs, lobsters, shrimp, and crawfish/crayfish.

Detailed explanation-5: -Crustaceans (Crustacea, /krəˈsteɪʃə/) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp.