🦀Crustaceans have evolved the crab shape multiple times through the process of carcinization.
🌊The crab shape enables greater mobility, allowing crabs to walk, run, swim, and burrow in different habitats.
🦞True crabs originated during the Cretaceous Period and their diversity increased during this time.
🦐There has been a long-term shift toward more crab-shaped species and a decline in long-bodied crustaceans.
🔄Some crustaceans have decarcinized, losing the crab-like shape and returning to a lobster-like form.