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18 Unbelievable Ocean Creatures You Never Knew Existed

Portuguese Man O’ War


Animal Overview: Often mistaken for a jellyfish, the Portuguese Man O’ War is actually a siphonophore, a colonial organism made up of specialized individual animals. Its long, venomous tentacles can deliver painful stings.

Habitat and Behavior: Found floating in the warm waters of the Atlantic, Indian, and Pacific Oceans, the Portuguese Man O’ War is propelled by the wind. Its tentacles can extend up to 50 meters, capturing fish and plankton.

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