Kerwanian

Captain Qwark's species is an unnamed humanoid species from planet Kerwan of the Solana galaxy, though they may not be native to that planet.

Biology
Members of Captain Qwark's species are Human-like humanoids, although they have large chins, three fingers on each hand, and exaggerated upper body proportions. They possess super strength, enough to lift 10 tons with one arm, are capable of flight, can survive in space without any protective equipment, and can hold their breath for incredibly long periods of time.

Notable Members
The only known members of this species are Captain Copernicus Leslie Qwark, and his unnamed parents (who we'll call "Mr. and Mrs. Qwark").