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

The video explores the Earth's mantle and the Mariotta Trench, focusing on clams living at depths of 5600 meters near low temperature vents. It explains the process of serpentinization, where mantle rock reacts with water to produce hydrogen and methane. The clams feed on hydrogen sulfide, which is generated through chemical reactions involving methane.

How do clams utilize hydrogen sulfide in their environment?

What role does methane play in the chemical reactions occurring near deep vents?