Fish rank as the most diverse group of vertebrates in the world. Scientists recognize over 37,000 distinct species, with many more waiting to be discovered. Most fish fall into the ray-finned group of ...

Brown algae is a common problem in many fish tanks, especially those that have been recently set up. It’s not dangerous to fish but can turn your beautiful aquarium into an ugly mess. This slimy layer ...

Harmful algae blooms are painting coastal shores in southwest Florida red and leaving swaths of dead fish — just weeks before thousands of people flock to the beach for spring break. The phenomenon, ...