Thanks ! Yes hopefully someone can add value.
potatoe---potato ... " In biology, any group of fish that stay together for social reasons are said to be shoaling (pronounced /ˈʃoʊlɪŋ/), and if, in addition, the group is swimming in the same direction in a coordinated manner, they are said to be schooling (pronounced /ˈskuːlɪŋ/).[1] In common usage, the terms are sometimes used rather loosely.[1] About one quarter of fishes shoal all their lives, and about one half of fishes shoal for part of their lives. "[2]