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.
Contention over post-Brexit environmental regulation is bubbling over as the UK withdraws from a European fishing convention. Campaigners are concerned that important cross-border marine protections may be rolled back.