Tardigrades have been found in at least one habitat.
Tardigrades ( [ ˈtɑrdᵻˌgreɪd ] also known as water bears , space bears , or moss piglets ) are water-dwelling , eight-legged , segmented micro-animals . They have been found everywhere from mountaintops to the deep sea , mud volcanoes , and from tropical rain forests to the Antarctic . Tardigrades can be found throughout the world , from the Himalayas ( above 6000 m ) , to the deep sea ( below 4000 m ) and from the polar regions to the equator .