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13132572. Portuguese man o war, Physalia physalis, with one Man-of-war fish
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13132572. Portuguese man o war, Physalia physalis, with one Man-of-war fish
Portuguese man o war, Physalia physalis, with one Man-of-war fish (Nomeus gronovii). The gas-filled bladder, or pneumatophore, remains at the surface, while the remainder is submerged. Portuguese man o war have no means of propulsion, and move passively driven by the winds, currents, and tides. Strong winds may drive them into bays or onto beaches. Often, finding a single Portuguese man o war is followed by finding many others in the vicinity. Because they can sting while beached, the discovery of a man o war washed up on a beach may lead to the closure of the beach. Stings from a Portuguese man o war are often extremely painful. They result in severe dermatitis characterized by long, thin, open wounds that resemble those caused by a whip. These are not caused by any impact or cutting action, but by irritating urticariogenic substances in the tentacles. Using its venomous tentacles, a man o war traps and paralyzes its prey while reeling it inwards to the digestive polyps. It typically feeds on small marine organisms, such as fish and plankton. It is notable for Nomeus gronovii to live within the deadly tentacles of a siphonophore, the Portuguese man o war, upon whose tentacles and gonads it feeds. Azores, Portugal Date
Media ID 24510730
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Colonial Commensal Commensalism Copy Dangerous Jellyfish Jellyfishes Poisonous Portuguese Space Sting Tentacles Venomous Vertical
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