Forget Bigfoot. Some of the ocean's rarest animals have been spotted far less often than mythical monsters. Many live in the twilight zone, 650 to 3,300 feet below the surface, where just enough ...

Add Yahoo as a preferred source to see more of our stories on Google. Jace Tunnell, of the Harte Research Institute in Corpus Christi, holds an assortment of heart urchin skeletons, more commonly ...