Sawfish
Sawfishes, also known as carpenter sharks, are a family of rays characterized by a long, narrow, flattened rostrum, or nose extension, lined with sharp transverse teeth, arranged in a way that resembles a saw. They are among the largest fish with some species reaching lengths of about . They are found worldwide in tropical and subtropical regions in coastal marine and brackish estuarine waters, as well as freshwater rivers and lakes.
Smalltooth sawfish
Small numbers are maintained in public aquariums in North America with studbooks listing 12 individuals (5 males, 7 females) in 2014. The only kept elsewhere are at a public aquarium in Colombia. It is the only species of sawfish that has been bred in captivity.