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

NOAA Ocean Exploration, 2025 Beyond the Blue