Negaprion is one of the 12 genera in the family Carcharhinidae. There are currently two known living species in this genus: the Lemon shark, and the Sicklefin lemon shark.

Both species are large and stocky, have a wide, blunt snout, and have two large dorsal fins of similar size. They are both yellowish-brown on their dorsal surface, and have a white belly. They also both have a similar diet consisting of bony fish, crustaceans, stingrays, and smaller sharks. Also, both species are viviparous.