Bighead

Bigheads are a strange species of quadrupedal creature that can be found on several planets of the galaxy.

Biology
Despite their name, the rounded mass is not apart of their head, but in fact their abdomen, with their actual head being just above their sets of insectoid legs. Attached to the abdomen are a set of long arms with tri-digit fingers.

It is speculated the round mass is used as a fat storage to feed off when no other food's available.