Physalia physalis, a marine cnidarian consisting of a floating colony of hydrozoans attached to a float, superficially resembling a jellyfish.
Used other than figuratively or idiomatically: see Portuguese, man-of-war.
A man whose occupation is fighting in wars; a soldier, a warrior.
A powerful armed naval vessel, primarily one armed with cannon and propelled by sails; a warship.
The Arctic skua (Stercorarius parasiticus).