A translucent jellyfish with long tentacles in dark ocean water.
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Dinner Plate Jelly
A dinner plate Jelly (Solmissus sp.) observed on the eighth dive of the Papahānaumokuākea ROV and Mapping expedition. Two individuals were found during the fourth transect at 600 meters (1,969 feet) depth.
Credit

NOAA Ocean Exploration, 2025 Beyond the Blue