Since this is one of the most studied sharks, the main mystery that remains is the origin of its name. There are three theories to what it could be. The first, and most common, is that the shark is named for the sucking sound it makes as it hunts, possibly resembling a nursing baby. The other two theories involve archaic words - ‘nusse’ and ‘hurse’. Nusse refers to catsharks, which is still a term applied to nurse sharks in Caribbean waters, where they are called "tiburon gato". Hurse is an Old English word for sea-floor shark.
Scientific And Common Names