Crofton, Maryland - As fish go, the northern snakehead is something to behold. The toothy, torpedo-shaped native of the Yangtze River in China grows up to one metre long, and when its food sources run ...

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 ...