shoal

Noun

• a large group of fish
  • a school of small glittering fish swam by
    

• a stretch of shallow water

• a sandbank in a stretch of water that is visible at low tide

Verb

• become shallow
  • the lake shallowed over time
    

• make shallow
  • The silt shallowed the canal
    

Related words

• Synonyms: 
  school , shallow