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)
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... that is less likely to be attacked by a predator. Such as one that is faster (more adept at avoiding predators) or one that congregates (flocks or shoals for example, the mimic will join the congregation). Müllerian mimicry is where 2 or more animals look alike and share a common defense such as ...
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