You may think that since sharks have noses, they use them for breathing. However, unlike mammals, they use them only to smell, not to breathe. Sharks are fish, so they do not have lungs, either. So ...

Even fish sometimes hold their breath in cold, dark, deep water. Scalloped hammerhead sharks living near Hawaii spend their days basking in warm surface waters. But at night, these fish hunt for squid ...

Scalloped hammerheads appear to hold their breath when they dive into cold, deep water. By shuttering their blood-rich gills, they may keep warm while hunting prey, effectively sidestepping their own ...

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, published today in Science by ...

While swimming in cold, deep waters, scalloped hammerhead sharks have an unusual way of keeping warm: They close their gills and hold their breath. This unusual behavior, documented Thursday in ...

The amount of human debris and litter in the oceans is a serious danger to wildlife everywhere. The most dangerous types of debris for wildlife is plastics and derelict fishing gear like old nets.

Hammerhead sharks are able to deep dive to frigid, near-freezing waters to catch rare prey. But scientists have long been confused about how the cold-blooded animals survive such cold waters. A new ...