Cast-Iron Foot: Undersea snail has mineral armor

An as-yet-unnamed species of snail living around hydrothermal vents deep beneath the Indian Ocean bears an unusual suit of armor forged from the dissolved minerals spewing into its seafloor habitat.

SULFIDE SHINGLES. The iron–sulfide-encrusted scales on the foot of this snail may protect it from predators in its hydrothermal-vent environment (background of composite photo).