<P> Red tide is a common name for a phenomenon known as an algal bloom ( large concentrations of aquatic microorganisms ) when it is caused by a few species of dinoflagellates and the bloom takes on a red or brown color . Red tides are events in which estuarine , marine , or fresh water algae accumulate rapidly in the water column , resulting in coloration of the surface water . It is usually found in coastal areas . </P>
<P> Red tide is a common name for a phenomenon known as an algal bloom ( large concentrations of aquatic microorganisms ) when it is caused by a few species of dinoflagellates and the bloom takes on a red or brown color . Red tides are events in which estuarine , marine , or fresh water algae accumulate rapidly in the water column , resulting in coloration of the surface water . It is usually found in coastal areas . </P>
which group of organisms is most commonly responsible for red tides
which group of organisms is most commonly responsible for red tides
dinoflagellates
dinoflagellates