Portuguese man-of-war

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Physalia physalis

the Portuguese man-of-war, a jellyfishlike animal consisting of a complex colony of individual members that can inflict extremely painful stings.

Portuguese man-of-war

n.
A colonial siphonophore (Physalia physalis) composed of numerous specialized zooids, having a bluish bladderlike crested float from which hang numerous long stinging tentacles.

Phy·sa·li·a phy·sa·lis

(fī-sā'lē-ă fī-sā-lis)
The Portuguese man-of-war, a jellyfishlike animal consisting of a complex colony of individual members that can inflict extremely painful stings.
Synonym(s): Portuguese man-of-war.