What are the causes of red tide?
According to enotes red tide is a condition where the sea appears to be a reddish-brown color.
"This rusty-red discoloration is caused by an exploding population of tiny single-celled microorganisms called dinoflagellates, which are usually found in ocean water, but occasionally in lakes and rivers as well."
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Red tides are caused by an explosive growth and accumulation of certain microscopic algae, predominantly dinoflagellates, in coastal waters.
Red tide is actaullly a result of algal bloom..Also anthropogenic factors like pollution and natural factors cause red tides!