Atlantic menhaden, also known as Brevoortia tyrannus, is a species of fish commonly found in the Atlantic Ocean. These fish have several synonyms, including bunker, pogy, mossbunker, and fat-back. These terms describe the various characteristics of the fish, such as their oily texture and high fat content. Atlantic menhaden are important for their role in the ecosystem, serving as a food source for larger fish, birds, and marine mammals. They also play a critical role in the fishing industry, as they are used for bait and in the production of fish oil and fish meal. Despite their importance, these fish face threats from overfishing, pollution, and habitat destruction.