Salp

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A salp plural salps, also call colloquially as “sea grape” or salpa plural salpae or salpas 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. The salp strains the pumped water through its internal feeding filters, feeding on phytoplankton.

Nervous systems in addition to relationships to other animals

Salps are closely related to the pelagic tunicate groups Doliolida together with Pyrosoma, as well as to other bottom-living benthic tunicates.

Although salpssimilar to jellyfish because of their simple body produce and planktonic behavior, they are chordates: animals with dorsal nerve cords, related to vertebrates animals with backbones.

Small fish can and develope swim inside salps, using the salp's membrane, even though this is the transparent, as the only protection usable from predators.