Living near hydrothermal vents in the Indian Ocean, the scaly-foot snail (Chrysomallon squamiferum) defies survival norms with its iron-clad armor and ability to withstand 350°C temperatures. This extraordinary gastropod, discovered in 2001 near the Kairei hydrothermal field, boasts a three-layered shell infused with iron sulfides, making it one of the few animals on Earth to incorporate metal into its exoskeleton. Its survival hinges on a tiny habitat—just two football fields in size—where it thrives in a world devoid of sunlight, relying on bacterial symbiosis for nutrition.
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