More than 700 dams are built along the river and its tributaries and there are very few functional “fish passages” to help species navigate obstructions, said Brian Eyler, director of the ...

Since the Clean Water Act, biodiversity in the Chicago River has increased, and there are now over 60 species of fish, including mimic shiner and brook silverside.

The fish can grow up to 4 feet long and has a noticeable knob at the tip of its lower jaw and a yellow patch surrounding its large eyes. It can grow as large as 66 pounds. The last confirmed ...

Although Medicine Bow-Routt National Forests is free to visit 24 hours a day, access fees do apply for some of its facilities. Expect to pay $5 to park at most trails, picnic areas and boat launches.

In a river of northern Bolivia, a silvery predator with “sharp” teeth swam through the murky waters. Its white eyes scanned ...

Researchers named species of vibrant, genetically distinct fish, the Locust Fork Darter and the Sipsey Fork Darter, from AL’s Black Warrior River System.

A new species of fish has been discovered in the Amazon: a piranha relative with humanlike teeth. The eye-catcher was named after a “Lord of the Rings” villain.

Unsustainable development threatens the health and diverse fish populations of the Mekong river, with one-fifth of fish species in Southeast Asia's main artery facing extinction, a report by ...

With assistance from the West Virginia Division of Natural Resources, 21 separate species of fish were sampled from the West Fork River at Weston and the Tygart Valley River at Elkins.

These invasive fish can be huge and powerful. Elaine Gainer, the Aquatic Nuisance Species Program Coordinator with the State Wildlife Department, said both can be found in the Red River, while ...

The fish is highly predatory and some species have the ability to breathe air while crossing land to new bodies of water. The snakehead has been found in parts of Maryland as well as in Lake Michigan.

Anglers are getting more places to fish thanks to agreements being made in several parts of Pennsylvania, and bow anglers might soon have a new species to pursue. The Pennsylvania Fish and Boat ...