A major reason why scientists know so little about giant freshwater rays is because they hide at the bottom of the river. They’re not considered a good food fish in Southeast Asia, so they’re ...

Fish can be found in freshwater ... Sharks hunt for food. They are predators. Inside their strong jaws are lots of strong pointy teeth. Pike are predators too and live in lakes.

Recent findings show bigmouth buffalo fish have perplexingly long lives and appear to get healthier as they age. But scientists are worried their population is about to crash.

Eels are most often sold live, although they are sometimes available ... Eels are a traditional ingredient in the typical French freshwater fish stew, Matelote. They’re also very popular in ...

Metazoan parasites, including various types of worms and flatworms, are common in freshwater fish species and can significantly ... Multicellular organisms that live on or in a host organism ...