Crabs must molt because their hard, calcified exoskeleton cannot grow with them. Before molting, they reabsorb calcium and weaken their old shell from the inside. During ecdysis, they painfully pull ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A park ranger has captured incredible time-lapse footage of a ...

Blue Crab on Beach of Florida© Katarina_G/Shutterstock.com A crab’s exoskeleton protects it like armor and gives the animal structural support. Without the process of molting, crabs and other ...