Grand Bay National Wildlife Refuge is home to unique and diverse ecosystems. Habitats on this refuge basically consist of tidal marsh and pine/savanna. These habitats provide excellent food and cover for many species of fish and wildlife. Coastal marsh contributes essential food and cover for over 90 percent of marine fishes such as spotted seatrout, red drum, flounder, blue crab, and shrimp. The Valuable Mississippi/Alabama seafood industry is highly dependent on coastal marsh. These tidal wetlands also provide valuable habitat for wildlife such as waterfowl, wading birds, mammals, reptiles, and amphibians.