‘Patchy’ Red Tide Bloom Persists Off Florida’s Gulf Coast

BRADENTON, FL — A persistent red tide bloom that has plagued the west coast of Florida over the past few weeks remains very much present with fish kills reported in some areas and respiratory irritation in others.

According to the Florida Fish and Wildlife Conservation’s Midweek Red Tide Status Report issued Wednesday, “fish kills affecting multiple species have been reported along Manatee and Lee counties over the past week.” Reports of respiratory irritation have come in from Lee County’s Gasparilla Island and Manatee Beach. FWC anticipates the bloom will experience a “net southern, offshore movement of surface waters, and southern, onshore movement of subsurface waters” between south Pinellas and Collier counties over the next few days.

Florida’s Gulf Coast has been dealing with on-again, off-again red tide issues for a few weeks. Red tide is a naturally occurring organism, also known as Karenia brevis, found in Gulf waters. When it accumulates in large amounts, it can kill fish and lead to respiratory irritation in people and animals.

Toxins in red tide can “enter the air and cause respiratory irritation among beachgoers, such as coughing, sneezing or a scratchy throat,” according to Sarasota’s Mote Marine Laboratory. Mote scientists conduct year-round monitoring of Bay area waters.

According to FWC, red tide was found in water samples as follows over the past week:

• Pinellas County – background to very low concentrations in three samples
• Manatee County – background to high concentrations in 13 samples
• Sarasota County – low to high concentrations in 10 samples
• Charlotte County – very low to low concentrations in six samples
• Lee County – background to medium concentrations in 16 samples
• Collier County – background to medium concentrations in six samples

Florida red tide blooms can be rather patchy, according to Mote Marine. Beaches with background to high concentrations can be located in close proximity to one another. That means effects might be noticeable at one beach, but not at a nearby location.

Beachgoers with respiratory conditions, such as emphysema and asthma, may be more susceptible to red tide irritants. FWC recommends these public health tips when red tide is present:

• People who experience issues, such as nose, throat and eye irritations may want to leave the immediate area
• Those with severe or chronic respiratory conditions should avoid areas that are known to have active red tide
• When dead fish are present alongshore, it is advised that beachgoers avoid swimming in the water
• Red tide may also pose a risk to pets. Pets should not eat fish or drink water from water with a high concentration of red tide
• Recreational harvesting of such mollusks as hard clams, mussels and oysters is banded when red tide is present. To find out if harvest of shellfish is available in an area, visit the Florida Department of Agriculture and Consumer Services, Division of Aquaculture online.

To find out the conditions on local beaches, check out Mote Marine’s online tracking tool. To find out more about red tide and its presence in Florida, visit FWC online.

To report fish kills, call the FWC’s Fish Kill hotline at 800-636-0511 or submit a report online. FWC updates red tide status on Friday afternoons.

Map courtesy of the Florida Fish and Wildlife Conservation Commission