The UN assessment of the state of migratory freshwater fish revealed an 81% decline in the last 50 years.

Neoplasia in fish species encompasses a diverse array of tissue proliferations ranging from benign growths to overtly malignant tumours. Although many neoplastic lesions in fish are ...

Some of the longest, most important migrations of species on Earth are happening beneath the surface of the world's rivers ...

In the wide, sandy stretches of Brazil’s Araguaia River, the piraíba, South America’s largest catfish, is a cornerstone of ...

Older than dinosaurs, these 8 ancient fish existed millions of years earlier and some still survive today in oceans, rivers ...