Freshwater fish populations that dwell nearer the poles are outperforming their equatorial counterparts, researchers have found.

Six critically endangered Mekong giant catfish — one of the largest and rarest freshwater fish in the world — were caught and ...

Climate change warms waters near the poles, enabling larger migratory fish like salmon to flourish. Equatorial populations ...

Other mussels can jump up and clamp onto a fish’s face to expel their larvae onto its gills. • Worldwide there are 890 known freshwater mussel species, and 302 of those live in North America.

A lizard with a name that sounds like it could star in Game of Thrones, a soft furred hedgehog, a high-altitude crocodile ...

Freshwater fish populations that dwell nearer the poles are outperforming their equatorial counterparts, researchers have found. Large-bodied migratory species such as Atlantic salmon are thriving as ...