shad

This term refers to a specific group of herring-like fish known for their migratory patterns between saltwater and freshwater. It carries a connotation of seasonal abundance, particularly in the context of traditional spring fishing harvests in North American and European river systems.

Grammatically, this noun is an invariant plural or a collective singular. Like many fish species names, the plural form is typically identical to the singular form, meaning one does not add an s to indicate multiple fish of this species.