Phibian

Phibians are a primitive species native to the oceanic planet Aristo.

Biology
Like their name suggests, they're amphibious. They have five-fingered hands with claws and webs, a lizard-like head and tail, and make both hissing and grunt-like vocalizations.

Their sapience level is unclear, but they're known to attack those who venture into the planet's tunnels. Their world is 90% covered by water with a distinctively acidic composition.

Appearances

 * Blake's 7, s01e13, "Orac" (1978)