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Sawfish, a member of the Ray family, is characterized by its long, flat jagged muzzle - called Rostrum - which resembles a saw. There are two varieties in the western part of the Atlantic Ocean: Smalltooth and Largetooth. It belongs to the subclass of Elasmobranchii, a group of fish including sharks and skates, which have skeletons composed of cartilage instead of bone. Like Stingray, its gills are placed on its flat underside, along with the mouth and nostrils.

In 2010, seven saws were recognized in the world. It is located in shallow coastal waters in tropical and subtropical areas and adapts to fresh and salty water equally well. He is a member of the Pristidae family, from the Greek word pristēs , which means "Saw". As a result of residence in muddy waters, his eyes have never fully developed. Its rostrum has evolved increased senses to help catch food and provide protection. Or bed where they host prey. When the saw detects the courts like snails and shrimp, they are dug by a rostrum. They also hunt by movingblades from side to side and cut with small fish schools. The fish are first impressed and then absorbed; During the process, some are stabbed on the saw teeth.

It is unknown that it is aggressive, if it feels threatened, the saw will use the rostrum in defense. Throughout history, the saw was used in various cultures for weapons, decorations and in the creation of instruments. The whole saws were sometimes used as offers in religious ceremonies.

Smalltooth Sawfish are Ovoviviparous, which means that the mother holds the eggs inside until it is ready to give birth to live fish called puppies. This process produces fewer children, on average about eight, which grow more slowly and take longer than ripen. This lower reproductive rate has contributed to macdrunes vulnerable to excessive fishing. Other factors include extensive coastal development and environmental pollution that drastically affected areas in which young fish would hide.

For these reasons 1 May 2003, the US provided federal protection of Smalltooth Sawfish according to the Act on Endangered species. In May 2010, Largetooth Sawfish was declared an endangered species, which is to hurt, kill, trade or have all parts of the saw in the US in 2011 the World Conservation Union (IUCN) The red list of endangered species included all seven saws.