Scientists doing their first exploring of deep-sea vents in the Antarctic said it was unlike anything found around other hydrothermal vents — a world populated by new species of anemones, predatory sea stars, and piles of hairy-chested yeti crabs.
Even in the eye-popping world of deep-sea vents, the Antarctic discoveries stand out, with the unfamiliar species of crabs found crowded in piles around the warm waters emanating from the seafloor. Many of the animals found at the vents have never been found at hydrothermal vents in other oceans, Rogers said. “To see these animals in such huge densities was just amazing,” Rogers told LiveScience.
In the dayless world of deep-sea vents, energy comes not from the sun but from the hydrothermal energy generated in the oceanic crust.
The yeti crabs seem to cultivate “gardens” of bacteria on their chests, which are covered with hairy tendrils. These bacterial mats almost certainly provides the crabs with sustenance, Rogers said. In turn, predatory seven-armed sea stars stalk the periphery of the vents, snacking on unfortunate crabs.