Richard Herrmann / Salp (Pegea sp) chain floating in open sea, San Diego, California

Richard Herrmann / Salp (Pyrosoma sp), San Diego, California

Juergen Freund / Colonial salp {Salpidae}, barrel-shaped, free-floating tunicates, Indo-pacific

Mike Parry / Salema (Salpa sp) portrait underwater, Hawaii

Hiroya Minakuchi / Salp (Salpa thompsoni), planktonic tunicate, Antarctica

Alex Mustard / A small fish, probably a Driftfish (Nomeidae), sheltering inside a Salp (Salpa sp.) in open water as part of the plankton, Bitung, North Sulawesi, Indonesia, Lembeh Strait.

David Fleetham / Pelagic tunicate (Salpa aspera) floating in the open ocean at night, Yap, Micronesia, Pacific Ocean.

Franco Banfi / Salps (Salpidae) drifting in the open ocean, Antarctic Peninsula, Antarctica, Southern Ocean.

Franco Banfi / Salps (Salpidae) drifting over the seabed, Antarctic Peninsula, Antarctica, Southern Ocean.

Doug Perrine / Colonial salp chain (Salpidae), with tiny (about 1cm) Cephalopod sheltering inside one of the blastozooids, probably a male or immature female Argonaut / Paper nautilus (Argonauta sp.), drifting in su...

Magnus Lundgren / Colony of common salps (Salpa fusiformis) Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean

Magnus Lundgren / Colony of common salps (Salpa fusiformis) Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean