Patrolians constituted a very smart, fish-like, amphibious sentient species that originated on the aquatic planet of Patrolia, their native world. Possessing both gills and fins located on their heads, they could survive both in the water and on land, breathing air; however, they felt most at ease when submerged in water, as they preferred liquid environments. Known for their great ingenuity, they frequently pursued careers as bounty hunters. Outside of water, their clothes needed to be adjusted to make space for the dorsal fin that stuck out from their backs. This species included individuals such as Bannamu, Kanna, and Robonino.