A view from a submersible during a 2006 NOAA Vents Program expedition shows a glimpse of a biological community at a Forecast Seamount vent site. The species that occur here and in the Mariana backarc spreading center differ from those on the seamounts of the Mariana arc to the north. Hydrothermal fluid temperatures up to 200 degrees C, one of the highest temperature vent systems known in the Mariana arc, were measured. Image courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program.