Crab
From Bandipedia, the Crash Bandicoot wiki
Crabs are the first enemies encountered in Crash Bandicoot and thus the first enemies encountered in the series. They do not directly attack Crash, as they mainly just walk the land and snap their claws repeatedly. They can be easily defeated with a jump or spin attack from Crash. The crab makes a cameo appearance in the less-than-100% completion ending of Crash Bandicoot 2: Cortex Strikes Back, passing by as Coco wonders what happened to Doctor Neo Cortex and his Cortex Vortex.
