In 1999, a clownfish (Amphiprion ocellaris) hatched in the aquarium of a tropical fish hobbyist in the UK. These clownfish ...

Learn how a small genetic change affects cell communication and reshapes the stripes seen in clownfish.

The Amazon Basin contains the largest number of scientifically described freshwater fish species in the world: 2,257 or 15% of the total number of known freshwater species. According to a new study, ...

A midbrain region in fish combines light signals from the eyes and the pineal organ, a light-sensing structure often called the 'third eye.' ...