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.
The global trade in ornamental fish is multi-million dollar industry. But popular movies like "Finding Nemo" can help fuel the demand for colorful home aquariums. Kids in Germany have been waiting in anticipation for "Finding Dory," which features a forgetful tang fish. But conservationists and animal welfare activists have mixed feelings about it.