Red Tide Current Status

This summary report of current red tide conditions around Florida includes a map of sampling results and regional status reports.


Red Tide Status
(November 21, 2014)

A bloom of the Florida red tide organism, Karenia brevis, persists in southwest Florida. Satellite images from early this week produced by the Optical Oceanography Laboratory at the University of South Florida show patches that extend approximately 50 miles alongshore and up to 35 miles offshore, depending on location, between Collier and Monroe counties. More recent satellite images are not available due to cloud cover.

Karenia brevis concentrations range from background to medium alongshore and offshore of Lee and Collier counties.  In several samples collected in the Pine Island Sound system (Lee and Charlotte counties), background concentrations have been detected.  Fish kills and respiratory irritation were reported on 11/15 and 11/16 alongshore of Marco Island (Collier County).

Forecasts by the USF-FWC Collaboration for Prediction of Red Tides (CPR), a partnership between the University of South Florida’s College of Marine Science and the Florida Fish & Wildlife Conservation Commission, project little net movement of bloom waters over the next 3 days.

Red Tide Status Map (November 21, 2014)

Bloom area with satellite image overlay November 21, 2014      
See larger map Adobe PDF

Statewide Map (November 21, 2014)

Statewide Red Tide Counts November 13-20, 2014
See larger map Adobe PDF

Regional Status Reports and Maps Adobe PDF (November 21, 2014)

Southwest coast report and map
East coast report and map
Northwest coast report and map

To see detailed information on this week's samples, view the current Statewide Google Earth map for November 21, 2014.

By using Google Earth, you can zoom in to specific locations and click on stations to see detailed information, including sample date and cell concentration. You must have Google Earth installed on your computer to view this map; the software can be downloaded from the Google Earth website. External Website

The FWRI Red Tide Status Line is now available to callers throughout the state. FWRI updates the recording each Friday by 5 p.m. Red Tide Status Line: 866-300-9399 (toll-free inside Florida only); 727-552-2448 (outside Florida).

Reports are updated on Friday afternoon except during holidays, in which case the report will be released on the closest day. Additional information, if available, is provided on Wednesday afternoon. To receive an e-mail when the current status has been updated, visit our subscription area.

Previous Regional Status Reports and Maps

November 14, 2014

Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

November 7, 2014
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

October 31, 2014
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

October 24, 2014
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

October 17, 2014
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

October 10, 2014
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

October 3, 2014
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

Key for Results

Description Karenia brevis cells/liter Possible Effects (K. brevis only)
NOT PRESENT - BACKGROUND background levels of 1,000 cells or less None anticipated
VERY LOW >1,000 to 10,000 Possible respiratory irritation; shellfish harvesting closures >  5,000 cells/L
LOW >10,000 to 100,000 Respiratory irritation, possible fish kills and bloom chlorophyll probably detected by satellites at upper limits
MEDIUM >100,000 to 1,000,000 Respiratory irritation and probable fish kills
HIGH >1,000,000

As above plus discoloration


Hotlines and Information Sources



FWC Facts:
White and brown shrimp depend on estuaries as nursery habitats, leaving when they reach 4-5 inches in length. This “shrimp run” occurs in late summer or early fall.

Learn More at AskFWC