The Selkath were strange fish guys. They were slimy gits. After Revan came to their world, he helped play Scooby-Doo and rescue some kidnapped Selkath children, whom the Sith were holding captive. They were not related to Darth Ackbar, contrary to HoloNet News reports.
Behind the scenes
Dr. Evil once abducted a bunch of Selkath in order to make a superweapon. It resulted in a bunch of Friggin Sharks With Friggin Lasers on their Friggin Heads. His plan backfired due to the nature of the Selkath's snobby aditude.