The Tharsis Troopers swim by whipping their tails and filtering water and zooplankton through a body cavity at their tip. The solitary Trooper reproduces asexually to produce a broader mass chain. Individuals in the chain are hermaphroditic, starting life as females. These young females are fertilized by older males from another chain.

Bowltraps are colorful creatures that attach to the rock bottom. A fringed opening on top allows zooplankton to enter the bowl. When the Bowltrap senses that its prey has entered, it snaps the fringe tissue shut and contracts its body to digest the food.