Definition of Physalia arethusa. Meaning of Physalia arethusa. Synonyms of Physalia arethusa

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Definition of Physalia arethusa

Physalia arethusa
Physalia Phy*sa"li*a, n. [NL., fr. Gr. ? a bladder, fr. ? a bellows.] (Zo["o]l.) A genus of large oceanic Siphonophora which includes the Portuguese man-of-war. Note: It has a large air sac, or float, with a sail-like crest on its upper side. Numerous zooids of different kinds are attached to the under side of the float. Some of the zooids have very long tentacles; some have a mouth and digest food; others produce gonophores. The American species (Physalia arethusa) is brilliantly colored, the float being pink or purple, and bright blue; the zooids blue. It is noted for its virulent stinging powers, as well as for its beautiful colors, graceful motions, and its ability to sail to windward.

Meaning of Physalia arethusa from wikipedia

- The Portuguese man o' war (Physalia physalis), also known as the man-of-war or bluebottle, is a marine hydrozoan found in the Atlantic Ocean and the Indian...