Koi kumonryu

Koi kumonryu is a species of black koi fish. Apparently, this is one of the few species to be transplanted from Earth to other worlds such as Hillys with little to no change or genetic offshoot. They differ from kumonryu on Earth only in that they no longer have a white swath across the head.

Ming-Tzu keeps a K. kumonryu as a pet in his shop.