The new tetra fish species measure about half an inch long, according to researchers. Photo by Lopez, G. G. S., Souza, C. S., Reia, L., Mantuaneli, L. A., Morales, B ...

Peaceful tanks look great, but they’re not always the most exciting. Some fish bring a lot more drama, and for hobbyists who ...

The ornamental fish trade is a booming global industry that generates billions of dollars every year. Over 90% of this trade involves freshwater fish. One of the most popular freshwater groups is ...

During a field expedition to the “heart” of the Amazon basin in Brazil, researchers discovered two small fish in the region’s tea-colored waters that were previously unknown to science. The fish, both ...