Origin: AS. Scolu, sceolu, a company, multitude, crowd, akin to OS. Skola; probably originally, a division, and akin to Icel. Skilja to part, divide. See Skill, and cf. School. Of fishes.
Origin: Shoaled; Shoaling.
1. A place where the water of a sea, lake, river, pond, etc, is shallow; a shallow. The depth of your pond should be six feet; and on the sides some shoals for the fish to lay their span. (Mortimer) Wolsey, that once trod the ways of glory, And sounded all the depths and shoals of honor. (Shak)