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.
For most people who celebrate Christmas the traditional dish is of course roast turkey. But the Czech Christmas dish is carp – the large, scaly fish that spends its time skulking around the bottom of ponds. The carp is normally filleted and deep fried, and accompanied by potato salad, but as Rob Cameron explains, not everyone is a fan of the fish or the dish, for various reasons.