Ferromanganese crusts draping rocks (and old sponge stalks) on Dive 17 at Fryer Guyot.
Ferromanganese Crusts
Image courtesy of the NOAA Office of Ocean Exploration and Research, 2016 Deepwater Exploration of the Marianas. Download larger version (jpg, 1.0 MB).

Ferromanganese crusts draping rocks (and old sponge stalks) on Dive 17 at Fryer Guyot.

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