A fossil of a tiny fish found in southwestern Alberta is expected to help scientists learn more about how catfish and carp evolved.

The fossil of a tiny fish found in southwestern Alberta provides new insight into the origin and evolution of otophysans, the supergroup of fish that includes catfish, carp and tetras, which today ...

The male ratfish has a unique, club-shaped appendage on its forehead, called a tenaculum, which it uses to cling to the female’s pectoral fin while mating. It turns out, those appendages are chock ...