User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-5805144-20141018020029/@comment-1921299-20141018183645

Arc..Have you SEEN crabs? they have small but dense and powerful legs.

Hermit Crabs have small legs too. If they were 'chubbied' up then they would look weirder...and to make them bigger would mean bigger skulls :p