In 1977, deep-sea hydrothermal vents—high-temperature, high-pressure environments—were discovered by humans, and how the creatures there adapted to their habitats is still being unveiled. This video addresses the question of whether there are specific adaptations in the exoskeletons of crustaceans inhabiting deep-sea hydrothermal vents that enable them to withstand high temperature and pressure conditions. It observes that two vent crustaceans, through convergent evolution, possess thermal stability that is 2.8 times higher than that of four different coastal species, allowing them to survive in the extremely high-temperature environments of their habitat. This is influenced by different compounds with similar elemental composition. The insights gained from studying crustaceans in such extreme environments can offer invaluable insights into the ongoing advancements of biological evolution.