A great multitude assembled; a crowd; a throng; -- said especially of fish; as, a shoal of bass.
To assemble in a multitude; to throng; as, the fishes shoaled about the place.
Having little depth; shallow; as, shoal water.
A place where the water of a sea, lake, river, pond, etc., is shallow; a shallow.
An elevation of the bottom, composed of unconsolidated (soft) material (i.e., any material other than rock or coral) which constitutes a danger to surface vessels. As a guideline, shoals may be considered to be covered by less than l0 fathoms. See ledge, reef, and rock.
An offshore hazard to navigation at a depth of 16 fathoms (30 meters or 96 feet) or less, composed of unconsolidated material.
sandy elevations offshore, which may be partially or fully submerged; transitory habitat
a surface-navigation hazard composed of unconsolidated material SHLU