red tide

From red +‎ tide.

red tide (plural red tides)

1. An algal bloom of sufficient quantity to cause discoloration (often red) in a body of water; red tides can potentially cause irritation or death to exposed creatures.
   1. specifically, one caused by Karenia brevis.

• crimson tide

• Alexandrium fundyense
• Alexandrium monilatum
• Gonyaulax
• Karenia
• Gymnodinium
• Dinophysis
• Noctiluca
• Chattonella
• Ceratium
• Amoebophyre
• Alexandrium
• Cochlodinium

• red tide on Wikipedia.Wikipedia
• Category:red tide on Wikimedia Commons.Wikimedia Commons