A shoal or large number of fish, porpoises, whales, etc., swimming together whilst feeding or migrating. Also in a school, inor by schools.

A large number of fish, porpoises, seals, whales, etc. swimming together; = school, n.2 1. in a shoal, inor by shoals.

A company, troop; also, a herd (of cattle), a shoal (of fish).

(a) a shoal of fish in the sea; (b) a shoal or bank in the sea.

A mass migration of fish, esp. up (or down) a river; a phase or part of this. Cf. run, v. 22b.

A huge shoal (of fish). Obsolete.