Red tides as a result of L. polyedra have been documented since the early 1900s in California. This year, the red tide stretches all the way from Baja California to Santa Barbara.” Most Read Therefore it is best to be cautious and assume that a bloom is toxic However, the phenomenon is unpredictable and they don't appear regularly in the region. Yes, the red tide is still here in Southern California. “In May 2018, the red tide lasted only a few days, while the October 1995 red tide lasted a month. This current one stretches from Baja California, Mexico up to Santa Barbara. Red tide is a common name for algal blooms, which are large concentrations of aquatic microorganisms, such as protozoans and unicellular algae (e.g. At this point (5/05/20) the red tide has been present in the waters of So Cal’s beaches for more than 3 weeks. Sometimes, however, phytoplankton blooms . The coast from Monterey Bay to the Mexican border is experiencing what's commonly known as a red tide event. The normal red tides that occur here in San Diego only tend to last about 1-2 weeks and the concentration is usually minimal. Massive red tide events only happen once every several years. Bioluminescent waves glow … Tags: glow, nature, red tide Mike Wehner has reported on technology and video games for the past decade, covering breaking news and trends in VR, wearables, smartphones, and future tech. Red tides are caused by algae, which are tiny, microscopic organisms that grow in the water. Almost all bodies of water have some algae, but in a red tide, there is a lot more algae in the water than usual. RK: The only organism that could produce a red tide that would be super dangerous would be Alexandrium [which] causes paralytic shellfish poisoning. In California the majority of red tides are not caused by species that producedeadly toxins such as domoic acid andthe paralytic shellfish poisoning toxins. 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