The species is restricted to hot vent habitats. Holothurians often occur on rocks, with the posterior end hidden in a crack, and the body stretched into the water and tentacles open, implying suspension feeding. On the South EPR, holothurians frequently occur among mussel clumps near the base of chimneys, where venting fluids are leaky, as well as among ?old? barnacle fields and clumps of barnacles on chimney edifices with little to no venting. C. hydrothermica is apparently opportunistic, able to switch between suspension and deposit feeding.