The U.S. government is mounting an emergency response in an effort to save a unique and endangered fish found off the coast of Florida. The details are strange. The National Oceanic and Atmospheric ...

Every year as part of the city’s St. Patrick’s Day celebrations, thousands of onlookers clad in green cheer on a boat crew sprinkling orange powder into the Chicago River to turn it a festive shade.

Before squaring up for a fight, some fish check themselves out in the mirror to make sure they're big enough. This strange behavior was seen in bluestreak cleaner wrasse (Labroides dimidiatus), who ...

University of Otago—Ōtākou Whakaihu Waka scientists have discovered that it takes mere minutes for a species of sex-changing fish to develop dominant behavior after a change in the pecking order. In a ...

While a dominant male fish from northern Mexico mates with a female, a small fella bides his time in the offing. Suddenly, the little guy darts in ahead of Mr. Big and plants his seeds on freshly laid ...

Fish can have all sorts of quirky behaviors, but spotting your fish lying motionless at the bottom of the tank can be a cause for concern. While it might look alarming, this isn’t always a sign of ...

Swedish University of Agricultural Sciences researchers release tagged juvenile salmon into a river. (Michael Bertram/Swedish University of Agricultural Sciences) (CN) — As Atlantic salmon face ...

A mysterious ailment causing fish in the Florida Keys to spin in circles has touched off a frantic race to find the cause and save an endangered species before it’s too late. Eight months into ...