Definition
Alosa is a genus of ray-finned fish in the family Clupeidae, commonly known as shads. These fish are typically anadromous, meaning they migrate from saltwater to freshwater to spawn. They are found in both the Atlantic and Pacific oceans, as well as associated river systems. Alosa species are important commercially and ecologically, serving as a food source for both humans and wildlife. Think of them as the travelers of the fish world. They're known for their long migrations. Some populations have declined due to habitat loss and overfishing.