David Shale / Siphonophore (Nanomia sp) close up of nectophores, and palpons. Gulf of Maine, Atlanic Ocean. Epipelagic species found up to 300m depth.

Solvin Zankl / Portuguese man-of-war (Physalia physalis) colony, underwater Sargasso Sea, Bermuda

Solvin Zankl / Portuguese Man-of-War (Physalia physalis) close up of tentacles, Sargasso Sea, Bermuda

Michael Pitts,Michael Pitts / Portuquese man o' war (Physalia physalis) colonial siphophore, Tobago, Caribbean.

Wild Wonders of Europe / Lundgren / Portuguese man-of-war (Physalia physalis) on the water surface, Pico, Azores, Portugal, June 2009

Wild Wonders of Europe / Lundgren / Portuguese man of war (Physalia physalis) Pico, Azores, Portugal, June 2009

Luis Quinta / Portuguese man-o-war {Physalia physalis} on sea surface, Azores, Atlantic ocean

Solvin Zankl / Deepsea Siphonphore {Nectalia sp}, Atlantic ocean

Doug Perrine / Pelagic nudibranch / Blue sea slug (Glaucus atlanticus) along with a much smaller relative, (Glaucilla sp) feeding on a Portuguese man o' war, (Physalia utriculus) Kona, Hawaii, Hawaiian Islands,...

David Fleetham / Siphonophore (Prya dubia) feeding by casting outgossamer tentacles to snare plankton at night, off the Kona Coast of Big Island, Hawaii.

Doug Perrine / Blue dragon / Blue seaslug (Glaucus atlanticus) feeding on a Portuguese man o' war (Physalia utriculus) along with a much smaller relative, Glaucilla sp. (upside down); Glaucus and Glaucilla store th...

Doug Perrine / Hula skirt siphonophore, (Physophora hydrostatica) with eggs, in surface waters of deep open ocean, Kona, Hawaii, USA.