Close-up of a coral with feathery polyps and a dark background.
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Benthic Ctenophores
Tentacles extend from benthic ctenophores that were observed attached to coral during Dive 14 of the Papahānaumokuākea ROV and Mapping expedition at 2,362 meters (7,749 feet) depth.
Credit

NOAA Ocean Exploration, 2025 Beyond the Blue