The deep-sea hydrothermal vent gastropod Thermocollonia jamsteci is a species of deep-sea hydrothermal vent gastropod in the family Colloniidae. It is commonly found in hydrothermal vent ecosystems, where it thrives in extreme conditions such as high temperatures and low oxygen levels. This species relies on chemosynthetic bacteria for nutrition, which oxidize sulfur compounds from vent fluids to produce organic matter. Thermocollonia jamsteci plays an important role in vent ecosystems by contributing to nutrient cycling and supporting microbial and faunal communities.