The Murray cod, named Arnie after Australia's recently retired Olympic champion Ariarne Titmus, was first tagged in 2022.

New simulations show that fish look downward when they swim because the stable riverbed below them provides more reliable information about their swimming direction and speed. Just as you might look ...

It’s one of the longest rivers in the United States, and it's full of fish. Discover what is lurking in the Arkansas River.

A new study of giant danios (not pictured) suggests schools of fish save 79 percent more energy in turbulent conditions than fish swimming individually. Gordon Firestein via Wikimedia Commons under CC ...

I have no idea if the fish swimming in it can see how muddy the water is. They probably go about minding their own business, ...

Water is a big part of our lives. Whether we're swimming in it, washing ourselves off with it or drinking it, human beings need water to survive. The average U.S. adult drinks about 44 ounces of water ...