A small international team of marine biologists has observed the first known instance of a shark intentionally making sounds. In their study published in the journal Royal Society Open Science, the ...

One group of sensory organs is the ampullae of Lorenzini ... The great hammerhead is the largest of the nine identified species of this shark. It can grow up to 20 feet in length and weigh ...

Sharks have a reputation for being silent killers — the top ocean predators are stealthy hunters, but they also lack sound-producing organs found in many other fish. Now, a groundbreaking new study ...

A parasitic fish called a lamprey sometimes attaches itself near a male shark’s claspers, or reproductive organs. This can make it more difficult for scientists to identify an individual’s sex.

Only 5% of the movements happened when the shark wasn’t obviously moving its body, according to the study. With no specialized sound-producing organs found in these sharks, the researchers are ...

The Great Barrier Reef is a tough place to live, even for a shark. Extreme tides and high temperatures leave the reef as a series of rockpools at low tide. Bigger sharks are forced into deeper ...