Answer :
Algal Bloom -- A rapid growth of microscopic algae or cyanobacteria in water, often resulting in a coloured suds on the surface.
Red Tides -- A discoloration of seawater caused by a bloom of toxic red dinoflagellates.
Red Tides -- A discoloration of seawater caused by a bloom of toxic red dinoflagellates.
red tides - very often red dinoflagellates undergo such rapid multiplication that they make the sea appear red.this is known as red tides.