Creepy, but worth watching until the end. Try NOT to think about this video during the rest of your day.

Because crabs have a hard outer shell (exoskeleton) that doesn't grow, young crabs must shed their shells in a process called molting.

To start the process, a crab reabsorbs material from the old shell and then secretes an enzyme to separate the old shell from its body. The crab generates a paper-like shell beneath the old one in a process that can take weeks.

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