Calyptogena spp. in Alaska
These clams (Calyptogena spp.) were discovered in about 1000 meter-deep waters off the southern tip of Alaska near a 250-meter-high cone rising from the seafloor and 10 kilometers from the Queen Charlotte-Fairweather fault. Evidence of fluid venting from the cone includes these clams, which live on nutrients produced by chemosynthetic bacteria that use components of the fluid (such as hydrogen sulfide or methane) as primary energy sources.