Imagine a world where the boundaries between “fish” and “not-fish” blur, where the ancestors of birds and mammals once swam ...

Scientists have uncovered a 50-million-year-old fish fossil that is so unique it may be classified under a new genus. Let’s ...

This clip could be used as an introduction to fish. Pupils could be asked to list the characteristics of fish and compare them with characteristics of other animal groups. This clip is relevant ...

For this, scientists use something called an "outgroup", a living descendant that still shares many of the ancestor's primitive traits. So we need a living jawless fish, like a lamprey.

A scientific study in Britain says chemicals flushed through the drainage system have caused about 20% of male freshwater fish to exhibit female characteristics. Researchers identified more than ...

These signs demonstrate contrasting traits and adaptability due to their ... Pisces, represented by two fish swimming in opposite directions, embodies the duality between fantasy and reality.

The Missouri Department of Conservation is warning Missouri anglers and those near waterways to keep an eye out for an invasive snakehead fish not native to the U.S.

Recent research challenges the assumption that planktivore reef fishes share uniform traits. Instead, these fishes exhibit ...