A salp (plural salps) or salpa (plural salpae or salpas[1]) is a barrel-shaped, planktic tunicate. It moves by contracting, thereby pumping water through its gelatinous body, one of the most efficient examples of jet propulsion in the animal kingdom.[2] The salp strains the pumped water through its internal feeding filters, feeding on phytoplankton.
Lots of jelly fish around here too...