Sea turtles and sawfish are vulnerable to hook and line gear. In the Gulf of Mexico, fishermen using hook and line gear must use circle hooks and dehooking devices to help any non-targeted fish survive, according to the U.S. National Marine Fisheries Service. Snapper fishermen have inadvertently caught speckled hind, Warsaw grouper, gag grouper, loggerhead sea turtles, green sea turtles, leatherback sea turtles, snowy grouper, Atlantic bluefin tuna, and blacknose shark. But most of the non-targeted fish caught in the fishery are not species of concern, the Monterey Bay Aquarium reported. Juvenile red snapper is also accidentally caught by shrimp fishermen, who are attempting to reduce this bycatch through improved management measures, including the use of bycatch reduction devices.