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This huge species of cnidarian in the genus Relicanthus with 8-foot long tentacles has attached itself to a dead sponge stalk on a polymetallic nodule in the CCZ. Image by Diva Amon and Craig Smith.

This huge species of cnidarian in the genus Relicanthus with 8-foot long tentacles has attached itself to a dead sponge stalk on a polymetallic nodule in the CCZ. Image by Diva Amon and Craig Smith.