A cidarid urchin in close proximity to a sponge - family Geodiidae, Geodia sp.
The rock surface appears to have the same stoloniferous coral as in
images expn7411 to expn7415.
Image ID: expn7654, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photo Date: 20160618T235941Z
Credit: NOAA/OAR/OER, 2016 Deepwater Exploration of the Marianas, Leg 3.
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