Menhaden are small, oily fish found along the Atlantic coast of North America. They play a crucial role in the marine ecosystem by serving as a food source for larger fish, birds, and marine mammals. Menhaden are often caught in large quantities and are used for various purposes, including fish meal and oil, which are important in the aquaculture and animal feed industries. These fish are also known for their ability to filter water, helping to improve the health of their habitats. By consuming plankton, menhaden contribute to maintaining a balanced ecosystem, making them vital for both the environment and the economy.