The skull crab begins life as a tiny crustacean the size grain of rice and resemble large, bulky crabs when fully grown. They inhabit beaches, lakeshores, and other areas where land meets water. Skull crabs are voracious eaters and grow to full size in less than three weeks. Once at full size they look for sleeping prey and using their concealed stinger (it's just underneath the back of their undershell) they anesthetize their prey from the neck down and either burrow a hole in their prey's skulls to feast on the brain tissue (most times) or lay eggs (if during matting season which happens twice a year during the summer months). A single skull crab can eat an entire brain in an hour. If without a shell (i.e., a skull) it goes about its gruesome task of severing the head from the body and disappearing into the depths of the nearby water where it hides to digest its meal. Overall, skull crabs are not dangerous on their own, but large groups of them can easily disable even a fully-grown adult.
Class: Dire Animal.
Fright Check: +2 (-2 if wearing a skull or -6 if it's a fresh head)