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Black Ircinia sp. Plate Sponge
The porous, black Ircinia sp. plate sponge had a diameter of 50 centimeters (20 inches) and was seen at a depth of 50 meters (164 feet) during the Exploring the Blue Economy Biotechnology Potential of Deepwater Habitats expedition.
Credit

Image courtesy of Exploring the Blue Economy Biotechnology Potential of Deepwater Habitats.