Red Tide Current Status

FWC reports on the current status of Karenia brevis blooms using tables, static maps, and interactive Google Earth maps. Archived status maps can be found in our Flickr gallery.

NEW: Daily Sample Map External Website

This map contains the last eight days of sampling and is updated daily at 5 p.m.
Please be sure to click on individual dots for sampling details.


Red Tide Status Update for December 7, 2018

Weekly Change December 1 to 7


Current Conditions
Bloom concentrations of the red tide organism, Karenia brevis, persist in Southwest Florida but were not observed in Northwest Florida or on the East Coast this past week. Additional details are provided below.

In Southwest Florida, observations of >1,000,000 K. brevis cells per liter (“high” concentrations) occurred only in one sample from Collier County over the past week. “Medium” K. brevis concentrations were detected in and/or offshore of Pinellas, Manatee, Sarasota, Lee and Collier counties. Relative to last week, K. brevis concentrations generally decreased from Pinellas to Lee counties and increased in parts of Collier County. K. brevis was present in three Northwest Florida counties and one East Coast county, but not at bloom concentrations (>100,000 cells per liter).

  • In Southwest Florida over the past week, K. brevis was observed at background to medium concentrations in and/or offshore of Pinellas County, background to medium concentrations in Manatee County, very low to medium concentrations in Sarasota County, low concentrations in Charlotte County, background to medium concentrations in and/or offshore of Lee County, and background to high concentrations in Collier County. For additional information, view the southwest coast report Adobe PDF and map Adobe PDF.
  • In Northwest Florida over the past week, K. brevis was observed at background to very low concentrations in Santa Rosa County, and low concentrations in Okaloosa and Gulf counties. For additional information, view the northwest coast report Adobe PDF and map Adobe PDF.
  • Along the Florida East Coast over the past week, K. brevis was observed at background concentrations in Palm Beach County. For additional information, view the east coast report Adobe PDF and map Adobe PDF.

Fish Kills
In Southwest Florida, fish kill reports were received for Manatee, Sarasota, Charlotte, Lee and Collier counties. In Northwest Florida, fish kills were reported in Escambia, Santa Rosa, and Gulf counties. On the East Coast of Florida, no reports of fish kills were received over the past week. More detailed information is available at

Respiratory Irritation
Respiratory irritation was reported over the past week in Southwest Florida (in Manatee, Sarasota, Lee, and Collier counties) and Northwest Florida (in Escambia County). Respiratory irritation was not reported on the East Coast of Florida. Additional details are provided in corresponding regional reports.

Forecasts by the USF-FWC Collaboration for Prediction of Red TidesExternal Website for Pinellas to Monroe counties predict minimal net movement of surface waters and net southeastern movement of subsurface waters in most areas over the next four days. Four day forecasts for Escambia to Gulf counties predict variable surface and subsurface transport in most areas.

Red Tide Status Map (December 7, 2018)
Statewide Red Tide Counts November 29 through December 6, 2018
View a larger map Adobe PDF (December 7, 2018)

To see detailed information on this week's samples, view the current Statewide Google Earth Interactive Map (December 7, 2018)External Website.

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 websiteExternal Website.

A midweek status update will be available on Wednesday, December 12th and the next complete status report will be issued on Friday, December 14th. Please check our daily sampling map which can be accessed from the top of this page.


Archived status maps can be found in our Flickr galleryExternal Website. Previous regional status reports and maps can be found on our red tide resources page.

Latest Red Tide Status Report Available by Phone
Call 866-300-9399 at any time from anywhere in Florida to hear a recording about red tide conditions throughout the state. Callers outside of Florida can dial 727-552-2448. Standard calling charges apply.

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.

Additional Information
For additional information about red tide and the current red tide bloom, including information on how to report a fish kill or other wildlife effects, consult health authorities about human exposure, or locate other resources, visit our Red Tide-Related Hotlines and Information Sources article.

Blue-Green Algae Bloom Information
Additional information regarding the current status of algal blooms in South Florida is being consolidated and posted on the Florida Department of Environmental Protection’s website: Website.


DescriptionKarenia brevis cells/literPossible 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

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