Twait shad are silvery, sometimes with a bronzy tinge, and there are a distinctive row of six to ten large dark spot just behind the gill cover though these may fade when the fish is dead. The adult length is typically . The twait shad is found in most of Europe and all countries bordering the Mediterranean Sea. "Alosa fallax" has a similar lifecycle to "A. alosa" (allis shad). They are known to live in sympatry. Some studies have suggested "A. fallax" and "A. alosa" species can hybridize. They are anadromous species, like many other species in the genus "Alosa". However, some
Boesemania Boesemania Boesemania is a genus of freshwater fish in the family Sciaenidae. This genus contains the single species Boesemania microlepis. Also known as the boeseman croaker and smallscale croaker, this fish lives in southeast Asian rivers. This is a relatively large species. It can reach in length and in weight. "Boesemania microlepis" lives in Cambodia, Laos, Indonesia (Borneo and Sumatra), Malaysia, Vietnam and Thailand. It is found in several rivers such as the Mekong, Chao Phraya River, Mae Klong, Nan River, Tha Chin River, and Bang Pakong River. This species appears to be sedentary. It prefers large, flowing rivers. During