Aquarium enthusiasts are often on the lookout ... actually a generic name that’s used to describe many kinds of ray-finned fishes. It mostly refers to one specific family of freshwater fish.

As their name implies, rainbow sharks have more aggressive personalities than many other ray-finned fishes. They’re considered a semi-aggressive breed in aquarium environments. Luckily ...

Bichir are bottom-dwelling freshwater fish native to western Africa. They are among the most primitive of the ray-finned fish, the dominant group of modern fish, which arose about 395 million ...

Internet outraged: ‘Not funny, animal abuse’ Fedortsov identified the blob as a smooth lumpfish, a species of marine ray-finned ... aquarium uses human cutouts to cheer up solitary fish ...