Piscon

Piscons are a sapient aquatic species from the same star system as the Pescatons. While the Pescatons' planet was destroyed by their expanding sun, the Piscons' planet was turned into a desert. The Piscons survived by taking water from other planets.

The Doctor has described the Piscons as being similar to the Pescatons in many ways, but less violent.

Biology
Piscons are 7 ft tall (~ 2.13 meters) ichthyoids that look like striped angel fish with crest-like fins on their heads and sharp crooked teeth.

Appearances

 * Doctor Who: The Companion Chronicles, Series 5, Peri and the Piscon Paradox (2011)