Anguilla Sucklandii is a scientific name given to a species of eel found primarily in New Zealand and Australia. This species is also known by several other common names, such as Longfin Eel, Silver Eel, and Black Eel. The Longfin Eel tag has more to do with its physical appearance, which differs from the typical New Zealand shortfin species. Its smooth and slender body, which can stretch up to 6 feet long, sets it apart from other eels. The Silver Eel tag points to the shiny silver appearance of the eel's belly, while the Black Eel tag is used for fully grown specimens, which typically have a dark-brown to blackish color.