…is a species of seastar that is native to the Southern Ocean and the waters around Antarctica. Like other seastars O.validus is a scavenger and will feed on anything it can find. The only thing that O.validus does not attack is members of its own species, this seems to be due to chemoreceptors. It is thought that this helps them congregate en mass to food sources as well. They are also very sensitive to water changes and as such they have undergone much research to help understanding global warming.