Cerberusa is a genus of blind troglobite freshwater crabs, in the subfamily Potamiscinae.

[1] The species C. caeca has strongly reduced eyes, filling less than half the orbit; it was originally found only in completely dark sections of the caves.

It is one of the few species of blind cave potamid crabs known, along with Diyutamon cereum and Phasmon typhlops.

[3] The original description[1] cites that «These crabs move very little, except when the water of their pools is disturbed, or when a bright light is shone on them, they then scuttle away.

The rearing up — chelae outstretched threat display typical of most crabs when threatened was never seen, though they attempted to nip a finger placed on the carapace.»