The Seviates are the creatures that Dr. Paradigm has Gene-Slammed. You could argue that the seviates are sea creatures that were gene-slammed with human DNA, but the deciding factor on what was and what was not a Seviate came from Repteel, who was formerly a human, and is repeatedly referred to as a Seviate.
Note 1: Moby Lick is listed here as he began his life as a Seaviate before he could break his mind-control.
Note 2: El Swordo is listed here because although he never WAS under Paradigm's control, an attempt WAS made to create him as such.
Note 3: In S03E13, Jab is Seviated - Temporarily.