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.
Longcomb sawfish
The longcomb sawfish has declined drastically and is listed by the IUCN as "Critically Endangered" in its Red List of Threatened Species. The fins (for shark fin soup) and saw (as novelty items) are highly valuable, while some parts are used in Asian traditional medicine and the meat is eaten. Fishing is the main threat, but it is also threatened by habitat loss. Because of the potential threat they (or rather their "saw") represent to humans, they are sometimes killed before being brought onto the boat when accidentally caught. Because of the "saw", all sawfish are particularly prone to becoming entangled in fishing nets.