The Fishing and Marine Industry Daily News Feed

More Red Tide for Southwest Florida

The red tide organism, Karenia brevis, persists in Southwest Florida. Over the past week, K. brevis was detected in 37 samples. Bloom concentrations (>100,000 cells/liter) were observed in one sample from Collier County. K. brevis was also observed at background concentrations in one sample from Northwest Florida. Additional details are provided below.

  • In Southwest Florida over the past week, K. brevis was observed at background to low concentrations in Sarasota County, low concentrations in Charlotte County, background to very low concentrations in Lee County, and very low to medium concentrations in Collier County.
  • In Northwest Florida over the past week, K. breviswas observed at background concentrations in Franklin County.
  • Along the Florida East Coast over the past week, K. brevis was not observed.

A fish kill suspected to be related to red tide was reported over the past week in Charlotte County. For more details, please visit:

Respiratory irritation was reported over the past week in Southwest Florida in Sarasota and Lee counties. For current information, please visit:

Forecasts by the USF-FWC Collaboration for Prediction of Red Tides for Pinellas to northern Monroe counties predict net northwestern movement of surface and subsurface waters in most areas over the next four days.

FWC-FWRI is working closely with the Florida Department of Environmental Protection (FDEP) and other partners on the Piney Point discharge response. Status updates including sampling results are posted on the Protecting Florida Together website:

The next complete status report will be issued on Friday, April 16th. Please check our daily sampling map, which can be accessed via the online status report on our Red Tide Current Status page. For more information on algal blooms and water quality, please visit Protecting Florida Together.

This information, including maps and reports with additional details, is also available on the FWRI Red Tide website. The website also provides links to additional information related to the topic of Florida red tide including satellite imagery, experimental red tide forecasts, shellfish harvesting areas, the FWC Fish Kill Hotline, the Florida Poison Information Center (to report human health effects related to exposure to red tide), and other wildlife related hotlines.

To learn more about various organisms that have been known to cause algal blooms in Florida waters, see the FWRI Red Tide Flickr page. Archived status maps can also be found on Flickr.

The FWRI HAB group in conjunction with Mote Marine Laboratory now have a facebook page.  Please like our page and learn interesting facts concerning red tide and other harmful algal blooms in Florida.

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