A large glass sponge surrounded by mussels, calcareous tube worms, hydroids, and crustose coralline algae.
Glass Sponge
Image courtesy of Amanda Kelley, the Deepwater Exploration of Glacier Bay National Park expedition. Download larger version (jpg, 3.6 MB).

A large glass sponge surrounded by mussels, calcareous tube worms, hydroids, and crustose coralline algae.

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