Iridogorgia coral with spiral branches on a dark ocean floor.
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Iridigorgia Coral
This beautifully spiraling Iridigorgia coral was observed at a depth of 1,695 meters (5,561 feet) during Papahānaumokuākea ROV and Mapping expedition Dive 01. Iridigorgia, along with Paragorgia, Metallogorgia, and Paramercidae, were the dominant coral fauna present during the dive.
Credit

NOAA Ocean Exploration, 2025 Beyond the Blue