Florida Red Tide Status Map, 7-20-18, Courtesy Of FWC, Florida Red Tide Report.

Florida Fishing Report: Red Tide Status, 7-20-18

Florida Fish & Wildlife Red Tide Status: Friday, July 20, 2018

FWC released the Red Tide Status Report this week.

Florida Fish & Wildlife Conservation Commission red tide bulletin at 4:25 PM 7/20/2018.

Red Tide Status Report (July 20, 2018)

A patchy bloom of the Florida red tide organism, Karenia brevis, persists in Southwest Florida.

In Southwest Florida over the past week, K. brevis was observed at background to high concentrations in 12 samples collected from Sarasota County, low to high concentrations in 11 samples collected from or offshore of Charlotte County, background to high concentrations in 20 samples collected from or offshore of Lee County, and background to low concentrations in nine samples collected from or offshore of Collier County.

Additional samples collected throughout Florida over the past week did not contain K. brevis.

Southwest Florida Red Tide Status Map, 7-20-18, Courtesy Of FWC, Florida Red Tide Report.
Florida Red Tide Status Map, 7-20-18, Courtesy Of FWC, Florida Red Tide Report.

Over the past week, fish kills were reported in Southwest Florida in Sarasota County (Casperson Beach, Manasota Beach, Nokomis, Siesta Key Beach, Venice Beach, Venice North Jetty), Charlotte County (Lemon Bay, Little Gasparilla Island), Lee County (Boca Grande Beach, Bonita Beach, Bowman’s Beach, near Burnt Store Marina, Captiva Beach, Cayo Costa, Fort Myers Beach, Gasparilla Island, near Laika Lane, Sanibel Beach) and Collier County (Barefoot Beach, South Marco Beach).

Respiratory irritation was reported over the past week in Sarasota County (7/12, 7/16, 7/18-7/19 at Lido Key; 7/12, 7/17-7/18, and 7/20 at Manasota Beach; 7/16 and 7/19-7/20 at Nokomis; 7/16 and 7/18-7/20 at Venice Beach and Venice North Jetty), Lee County (7/19 at Cayo Costa, 7/20 at Gasparilla Island State Park), and Collier County (7/12-7/13 at South Marco Beach).

Forecasts by the USF-FWC Collaboration for Prediction of Red TidesExternal Website for Pinellas to northern Monroe counties predict net southeastern transport of surface and subsurface waters for most areas over the next three days.

For more information, please see FWC.

Key for Results

Description Karenia breviscells/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


“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.

FWC’s Red Tide Action Report

Red tide is a naturally-occurring microscopic alga that has been documented along Florida’s Gulf Coast since the 1840’s and occurs nearly every year. Blooms, or higher-than-normal concentrations, of the Florida red tide alga, Karenia brevis, frequently occur in the Gulf of Mexico. Red tide begins in the Gulf of Mexico 10 to 40 miles offshore and can be transported inshore by winds and currents.

FWC Actions and Partnerships:

  • FWC operates the toll-free fish kill hotline. To report fish kills, contact the FWC Fish Kill Hotline at 800-636-0511 or submit a report online. Reports from this hotline help FWC researchers track and better understand the impact of red tide in Florida.
  • FWC remains available to local agencies and partners in affected areas, including area business and tourism groups in southwest Florida. Any local agency or group that has any questions or concerns can contact Kelly Richmond from the FWC at 727-502-4784.
  • FWC continues to partner with the Florida Department of Health to advise residents and visitors of any potential health impacts. Residents and visitors can contact the DOH’s aquatic toxin experts at 850-245-4250 or contact their local health department for any concern about health safety.
  • FWC’s Fish and Wildlife Research Institute and Mote Marine Laboratory work together to monitor Karenia brevis. This cooperative effort is designed to help mitigate the adverse impacts of red tide. This joint research program that includes red tide monitoring, research and public outreach and education has resulted in better tools and ongoing monitoring for red tides along the Gulf Coast.
  • In partnership with the FWC, the Collaboration for Prediction of Red Tides (CPR) at the University of South Florida offer a new Harmful Algal Bloom (HAB) tracking tool that generates a 3.5-day forecast of the bloom trajectories.
  • To protect public health, FWC’s Fish and Wildlife Research Institute’s Harmful Algal Bloom (HAB) group closely monitors the status of K. brevis on Florida’s coasts, providing technical support to the Florida Department of Agriculture and Consumer Services (FDACSExternal Website), the agency that regulates approved shellfish harvesting areas.
  • Since 2000, FWC’s Fish and Wildlife Research Institute established a Red Tide Offshore Monitoring Program, which is a volunteer program for citizens to help collect water samples from routine collection points and sites reported for suspected harmful algal blooms (HABs).The timely sampling by volunteers allows researchers to provide an early warning of offshore algal blooms and investigate reported events as they occur. The Program needs volunteers to collect samples from all coastal Florida counties. To view more information visit, Red Tide Offshore Monitoring Program or use the Volunteer SignUp Form.

Red Tide Resources