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Pacific Ring of Fire Expedition. Photosynthetic green and red algae is growingon the same rocks as chemosynthetic bacterial mat near the top of East Diamantevolcano. Usually, these two life forms are not found together because onedepends on the sun for energy and the other on chemical energy from deepsea hydrothermal vents. Here, however, submarine volcanoes come close to the surface. (Image credit: Pacific Ring of Fire 2004 Expedition. NOAA Office of Ocean Exploration; Dr. Bob Embley, NOAA PMEL, Chief Scientist)