Instead, hermit crabs have a hard exoskeleton on the front part of their bodies but a soft tail on the other half, which they protect using the discarded shells of other animals, like whelks.

you notice a conch shell. Stoutly made, it has six heavy spikes coming off it. Perhaps the maker is within. Or perhaps the maker is long dead, and the shell now belongs to a hermit crab.

This hermit crab wanders along a Puerto Rico beach with none other than a Lego-like brick as his shell. Produced by Jason Gaines. Video courtesy of Associated Press. Follow BI Video: On Facebook ...