What it looks like: Catfish are a diverse group of ray-finned fish and are generally dark grey in colour with a white belly and feature long whiskers.
Animal facts: Catfish get their name from their prominent barbels, which look like a cat's whiskers.
What they eat: Most species are omnivorous and consume a wide variety of foods - typical catfish eat things like other fish, invertebrates, aquatic plants and fish eggs. However, some catfish, such as some species in the loricariidae family, specialise on strange foods, such as wood and algae.
Where they live: Catfish occupy waters in every continent apart from Antarctica.
Habitat: Inland or coastal waters.