Officials say a toxic “red tide” is to blame for thousands of dead fish that washed up on Galveston, Texas beaches this weekend.

From this story in the Houston Chronicle:

State officials confirmed Monday that a toxic algal bloom known as red tide is responsible for thousands of dead fish that washed ashore on Galveston Island the day before. Texas Parks and Wildlife Department biologists found the algae Karenia brevis, one of several types of toxic algae that cause red tide, in concentrations high enough to kill fish in samples taken at Surfside Beach and Galveston Island, said Winston Denton, a biologist with the agency’s marine fisheries division and a member of its “spills and kills” team.

According to the story, biologists are still taking samples and trying to determine how extensive the bloom is and whether there may be more. Have you ever witnessed a “red tide” event?