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.

Red Tide Status (April 29, 2016)

A bloom of the Florida red tide organism, Karenia brevis, persists along Pinellas, Manatee, Sarasota, Charlotte and northern Lee counties in Southwest Florida.

Over the past week, K. brevis was observed at background to very low concentrations in 4 samples collected from Pinellas County; background to low concentrations in 6 samples collected from Manatee County; background to low concentrations in 32 samples collected from Sarasota County; background to low concentrations in 9 samples collected from Charlotte County; and very low concentrations in 2 samples collected from northern Lee County.

In addition, one sample collected from Okaloosa County (Northwest Florida) contained background concentrations of K. brevis.

No fish kills were reported in Southwest Florida over the past week. Forecasts for Southwest Florida by the USF-FWC Collaboration for Prediction of Red Tides show net southern movement of surface waters and southern onshore movement of bottom waters between Pinellas and Lee counties over the next 3 days.

Red Tide Status Map (April 29, 2016)

Southwest Coast red tide counts April 21 through 29, 2016

View a larger map Adobe PDF (April 29, 2016)

Regional Status Reports and Maps Adobe PDF (April 29, 2016)

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 April 29, 2016.

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

April 22, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

April 15, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

April 8, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

April 1, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

Additional archived status maps can be found on Flickr

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



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