Clams feed off Earth’s mantle near deep, low-temperature vents

Japanese and US scientists working from the Japanese R/V Yokosuka have found a species of clam near low-temperature vents in the Mariana Trench. The clams live at a depth of 5,620 meters in a subduction zone near vents where low-temperature water emerges from exposed mantle. The mantle reacts with the water in a process called serpentinization, producing hydrogen and methane. The methane produces hydrogen sulfide, which clams feed on. Sources: Mainichi Daily News, University of Hawaii