Portuguese Man-O-War Jellyfish (Physalia utriculus)

Keoki Stender's Portuguese Man-O-War Jellyfish (Physalia utriculus) picture, taken at Waimanalo Beach, Oahu.

The Portuguese Man-O-War Jellyfish (Physalia utriculus) is common on beaches during periods of strong onshore winds. It has a powerful sting. Large ones have floats 3-4 inches long and the tentacles may extend 10 feet or more. This Jellyfish is preyed upon by Violet Snails at sea and Ghost Crabs & Mole Crabs on beaches. The rare Man-o'-War Fish takes refuge near the tentacles in the open ocean. Collected at Waimanalo Beach, Oahu.