Definition of red tide in English:

red tide


  • A discoloration of seawater caused by a bloom of toxic red dinoflagellates.

    • ‘Commonly known as red tides, harmful algae blooms choke shallow waters and narrow inlets, and kill tens of thousands of fish annually.’
    • ‘On recent red tides that have been plaguing Victoria Harbour, the secretary said the cause was unknown.’
    • ‘It is possible that red tides don't occur during turbulent conditions because the turbulence prevents dinoflagellate populations from growing.’
    • ‘But 96 were believed to be caused by red tide, a toxic bloom of algae in the water.’
    • ‘Scientists studying red tides previously believed that after an algal bloom, high concentrations of brevetoxins didn't last long in the marine environment.’