Millions of people around the world rely upon them for food - but fish are also pretty cool creatures. Literally.
The cold-blooded aquatic vertebrates often play a very important role in ecosystems - whether in rivers, lakes or oceans. Here's an automated compilation of content relating to fish.
Despite the discovery of oil and the abundance of gold and other minerals in Ghana, 1.2 million people are unemployed, most of them young people. So instead of waiting around to get formal employment, some young people have opted to start farming catfish for sale as Maxwell Suuk found out on his recent tour of the coastal belt.
The Mekong is the longest river in South-East Asia. Over 70 million people, living in six different countries, depend on this river for their livelihoods. But development is putting the ecosystem here under threat. Sand mines and hydro-electric power stations are changing the water quality, blocking fish migration routes and crippling the stability of the river banks.