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  2. Mar 16, 2023 · Red tides are caused by several different microorganisms, all phytoplankton that use light energy to grow. In the U.S., red tides predate Spanish settlers; history shows Native Americans were...

    • 51 sec
    • Jenny Howard
  3. These tiny algae are essential components to ocean life as they fuel the food web by harnessing light energy from the sun. But when supplied with excess nutrients, they can multiply uncontrollably, becoming an unwanted mass commonly called a “red tide” that smothers nearby ocean life.

    • Danielle Olson
  4. A red tide is one type of harmful algal bloom. Blooms occur when colonies of algae--simple ocean plants that live in the sea--grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine mammals and birds.

  5. Red tide in Florida and Texas is caused by the rapid growth of a microscopic algae called Karenia brevis. When large amounts of this algae are present, it can cause a harmful algal bloom (HAB) that can be seen from space.

  6. What is red tide caused by? The red tide is a phenomenon that is caused by algae. While it might look like someone has tipped a lot of red dye into the sea, this discoloration is actually caused by millions of algae gathering under the sea.

  7. Sep 11, 2024 · A red tide is an event that occurs on the coastline when algae—a plant-like organism—grows out of control. The name “red tide” comes from the fact that overgrown algae can cause the water to change color. Red tides can be hazardous to human health and sea life.

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