The Allis Shad is a type of fish that is native to Europe and the Atlantic coast of North Africa. It is also known by various other names, including Alosa alosa, allice shad, anadromous shad, twaite shad, and featherback herring. The fish can grow up to 75 cm in length and is known for its distinctive silvery-white coloration. It is an important commercial fish, as well as an important part of the diet of many coastal communities. Allis shad are primarily found in rivers and estuaries, where they spawn in the spring and summer months. They are an important indicator of the health of these environments.