Fish have feelings too – at least if a lonesome sunfish in a Japanese aquarium is anything to go by. Animal caretakers at the ...

British marine biologist and photographer Richard Smith focuses his work on the ocean’s tiniest and weirdest creatures.

Here are five photos that beautifully illustrate why fish choose to group up. Striped eel catfish displaying schooling behavior. Such a group can be remarkably silent, even ... [+] though it might ...

The amount of sperm released decreased sharply with each mating during a single day, reducing the males' fertilization rate.

Although scientists don't know why these gigantic fish jump, they've at least measured how high: some of the most spectacular jumps can reach over 6.5 feet above the surface. And it's not just ...

Scientists are just beginning to understand the impact these particles are having on fish, the food chain, and ultimately, us. For this month’s story about microplastics—part of National ...

Ahmad Salem/Bloomberg/Getty Images The collapsed minaret of Abdullah ... Jorge Silva/REUTERS Thousands of dead fish float in the Piracicaba River after the water was contaminated in the protected ...