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.
Much of the salmon on our tables this festive season could come from Norway - or Scotland. But chances are it won't be wild, but farmed. Is this a sustainable way to keep us supplied with healthy fish? Critics aren't so sure. "Living Planet" pays a visit to Scotland to hear both sides of the story. Gudrun Heise presents this report by Gabor Paal.
Lake Victoria in Kenya is the world’s second biggest freshwater lake. Fishermen in traditional sailing boats and canoes used to catch a wide variety of fish there. But the mass import of tilapia from China is threatening the livelihoods of traditional fisherfolk.