twaite shad
alosa fallax latin

Some studies have suggested that the Alosa fallax and Alosa alosa species can hybridize.

The twait shad or twaite shad (Alosa fallax) is a species of fish in the Clupeidae family.

In May the Towy has a run of the rare and protected twaite shad (Alosa fallax) and allis shad (Alosa alosa).

It is estimated that the estruarine phase, or the time that they are in the estuaries migrating from spawning grounds to sea, has a duration in Alosa fallax of up to a year and a half.