Scalloped hammerhead sharks hold their breath to keep their bodies warm during deep dives into cold water where they hunt prey such as deep sea squids. This discovery provides important new insights ...

To survive as they seek food in freezing parts of the ocean, hammerhead sharks use a trick that hasn’t been observed in other fish. By Darren Incorvaia Hammerhead sharks like it warm, but for a good ...

Sharks are among the best swimmers on the planet, but new research suggests that even they sometimes "hold their breath" while diving deep underwater. The reason is that sharks are ectothermic, or ...

These three fish are freaks, phantoms and mysteries of the deep. Here’s what we’ve learned from the rare glimpses we’ve had of their lives. The deep sea is one of Earth’s final frontiers. Given its ...