The angel shark buried at the bottom of the ocean floor David Doubilet/National Geographic/Getty Images Of all the angel sharks, the Pacific angel shark (Squatina californica) is probably the most ...

A research expedition in the Tonga Trench filmed a Pacific sleeper shark, a slow-moving, opportunistic predator rarely seen ...

Warning: This graphic requires JavaScript. Please enable JavaScript for the best experience. Nicolas Tomasi has never laid eyes on it. He has worked these waters for ...

The angel shark, once widespread across Europe, is now listed as critically endangered, with waters around the Canary Islands the only place they are frequently seen. But there have been ...