Pacific Ring of Fire Expedition. Unusual spiny crab spotted on NW Rota 1 volcano . Crabs are opportunistic predators at vent sites. The body of this crab is ~2 in. (~5 cm) across.

Image ID: expl0101, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Location: Mariana Arc region, Western Pacific Ocean
Photo Date: 2004 April
Credit: Pacific Ring of Fire 2004 Expedition. NOAA Office of Ocean Exploration; Dr. Bob Embley, NOAA PMEL, Chief Scientist

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