A large group of yellowfin tuna swimming off the coast of Italy. Like all fish, they sleep, but it’s not like human sleep. Giordano Cipriani/The Image Bank via Getty Images Michael Heithaus, Florida ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. How well do you know your pets? Pet Psychic takes some of the ...

My goldfish hates when people tap on his tank. The tapping sound he hears in the water is loud and scary. I talked with my friend Rikeem Sholes about how fish hear. He’s a fish scientist who studies ...

Chris Kehrer, science program manager at Port Royal Sound Foundation in South Carolina, recently answered a question I have wondered about since childhood. Why does the Atlantic croaker, a marine fish ...

Michael Heithaus does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...