Lutjanus griseus, known as the gray snapper or mangrove snapper, is a medium-sized fish found in the western Atlantic Ocean. It inhabits coral reefs, seagrass beds, and mangroves. Gray snappers are recognized for their grayish body, sharp teeth, and nocturnal feeding habits, preying on small fish and crustaceans.

Lutjanus griseus, commonly known as the gray snapper, is native to the western Atlantic Ocean. Its geographical distribution extends from Massachusetts in the United States, southwards through the Gulf of Mexico and the Caribbean Sea, and along the coast of South America down to Brazil.

The gray snapper typically inhabits coastal waters, preferring estuaries, mangroves, seagrass beds, and coral reefs. It thrives in warm, tropical to subtropical climates, with water temperatures generally ranging from 22°C to 28°C (72°F to 82°F). The species can also be found in brackish and occasionally freshwater environments.

Lutjanus griseus is primarily a carnivorous fish, feeding on a diet of smaller fish, crustaceans, and mollusks. It plays a crucial role in the marine food web as both a predator and prey species. Juveniles often seek shelter in mangroves and seagrass beds, which provide protection from predators and a rich source of food. Adults are more commonly found around reefs and rocky substrates, where they can find ample food and cover.