The aptly named yeti crab is definitely one curious creature. Only discovered in 2005, it is is blind, hairy and spends its entire life on the ocean floor 7,000ft down (2,133m), where it is drawn to warm water around hydrothermal vents. It holds its hairy arms over the vents and scientists believe it may be farming the bacteria that grow in the hairs, either to eat or to detoxify poisonous minerals emitting from the vents.