The twait shad is a typical herring-type fish and much resembles the allis shad. It has no lateral line and the belly is more rounded than that of the sprat and Baltic herring. The gill cover is ridged and the caudal peduncle has large, … See more

The twait shad is found in most of Europe and all countries bordering the Mediterranean Sea. See more

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 speci… See more

Populations have been reduced primarily through overfishing, pollution, habitat destruction and migratory route obstruction in the Victorian Era. Hybridization between species is more likely with species affected by human … See more

Four special areas of conservation have been designated in Ireland where Alosa species have been known to spawn. Alosa fallax "has been placed in Appendix III of the Bern Convention (1979) that lists protected f… See more