Submerged mound of sand that generally runs parallel to the shore and caused waves to break before reaching the beach.

An area in shallow water where wave or current action has created a small, long hill of sand. Since they are created by water movement, they can move and may not be shown on a chart.

An offshore ridge or mound which is submerged (at least at high tide), especially at the mouth of a river or estuary, or lying parallel to, and a short distance from, the beach.

offshore shoals, built up by wave, current, or wind action; transitory habitat