SHOALS

noun

1. A sandbank or sandbar creating a shallow.
2. A shallow in a body of water.

verb

1. To arrive at a shallow (or less deep) area.
2. To cause a shallowing; to come to a more shallow part of.
3. To become shallow.

noun

1. Any large number of persons or things.
2. (collective) A large number of fish (or other sea creatures) of the same species swimming together.