This beautiful siphonophore, Pyrostephos vanhoeffeni, is typically encountered in Antarctic waters. Siphonophores are not an individual animal, but a colony of individuals that all serve a ...

Not only is it not a jellyfish, it's not even an "it," but a "they." The Portuguese man-of-war is a siphonophore, an animal made up of a colony of organisms working together. The man-of-war ...

The Mekong giant catfish is the official freshwater heavyweight champion of the world. According to the Guinness Book of Records, a nine-foot-long individual caught in northern Thailand in 2005 ...