Bythograeidae is a family of crabs known as the "yetis" or "yeti crabs." They are primarily found in deep-sea environments, particularly around hydrothermal vents. These crabs are notable for their unique adaptations to extreme conditions, including high temperatures and pressures. Members of the Bythograeidae family have a distinctive appearance, often featuring hairy claws that may help them cultivate bacteria for food. They play a crucial role in their ecosystems, contributing to the nutrient cycle in deep-sea habitats. Their study helps scientists understand life in extreme environments and the adaptations necessary for survival.