At East Diamante volcano (190 m, 623 ft depth), the chemosynthetic and photosynthetic communities overlap. Patches of encrusting red and green algae lie beneath filamentous bacterial mats on rock surfaces. The small white corals on the rocks are about 5 cm (2 in) long. Image courtesy of Submarine Ring of Fire 2004 Exploration, NOAA Vents Program.
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