淺水作用
Shoaling \Shoal"ing\, a.
Becoming shallow gradually. ``A shoaling estuary.'' --Lyell.
Shoal \Shoal\, v. i. [imp. & p. p. {Shoaled}; p. pr. & vb. n.
{Shoaling}.]
To assemble in a multitude; to throng; as, the fishes shoaled
about the place. --Chapman.