Appearing in the second Doctor Who story the Underwater Menace the fish people were humans who were surgicly transformed into fish people by damon so they could breathe underwater. The atlanteans used them to gather plankton and other various sea foods, which they then ate. Later Sean and Jako convince them to overthrough the atlanteans and bring for themselves.
- There is a Target Novel based on the story.
- Episodes 1 and 4 are lost so it is presumed that they will be released with some animated segments as well.