Florida Fish: Red Tide Toxins Hiding in Your Grill?

By Franklin Everett Shaw

May 23, 2026

The smell of grilling fish hangs heavy in the air, a quintessential Florida experience. But beneath the surface of this idyllic scene lurks a potential danger: red tide. For those of us living in coastal communities like Sarasota or Naples, understanding red tide and its impact on seafood safety is not just a matter of convenience, it’s a matter of health.

Red tide, caused by blooms of the Karenia brevis algae, produces brevetoxins. These toxins can accumulate in shellfish and, to a lesser extent, in finfish. Grilling that snapper you just caught might seem like the perfect way to end the day, but if red tide is present, you could be serving up a dose of neurotoxins.

So, how do we navigate this potential hazard and still enjoy the bounty of the Gulf? It’s all about knowledge, caution, and making informed choices.

First, know your enemy. Red tide isn’t always a dramatic, blood-red spectacle. Sometimes it’s subtle, almost invisible. Look for these telltale signs:

• Discolored water: Obvious, but not always present. The water might appear reddish-brown, but can also be a murky green or even appear normal.
• Dead fish: A sudden die-off of fish is a strong indicator. This is especially true if it involves multiple species.
• Respiratory irritation: If you’re near the water and experience coughing, sneezing, or watery eyes, red tide could be the culprit. Brevetoxins can become airborne.
• Unusual smell: Some describe it as a fishy or metallic odor.

If you observe any of these signs, err on the side of caution. Don’t harvest shellfish or finfish from the area.

Fish Selection is Key. Not all fish are created equal when it comes to red tide. Filter feeders like oysters, clams, and mussels are the biggest concern because they concentrate brevetoxins. Finfish, especially those higher up the food chain, are less likely to accumulate dangerous levels. However, some species are more prone to toxin accumulation than others.

• Safer choices: Grouper, snapper, mackerel, and mahi-mahi are generally considered safer options. These fish are fast-moving predators and don’t typically feed in areas heavily affected by red tide.
• Avoid or be cautious with: Shellfish (oysters, clams, mussels), bottom feeders (like catfish), and fish caught in areas known to be affected by red tide.

Preparation Matters. Even with safer fish, proper preparation can minimize potential risks.

• Gutting and cleaning: Remove the guts and gills immediately after catching the fish. Brevetoxins tend to concentrate in these organs. Rinse the fish thoroughly with clean water.
• Cooking: While cooking doesn’t destroy brevetoxins, it can reduce their concentration. Grill the fish thoroughly, ensuring it reaches an internal temperature of 145°F (63°C).
• Avoid using affected water: Don’t use water from areas affected by red tide to clean or cook your fish.

Sourcing Alternatives During Blooms. Sometimes, the best approach is to simply avoid locally caught fish during a red tide bloom.

• Buy from reputable sources: Purchase fish from established seafood markets or grocery stores. These businesses typically source their fish from areas unaffected by red tide or test their products for toxins. Ask your fishmonger about the origin of the fish and whether it has been tested.
• Explore alternative proteins: Consider grilling chicken, steak, or plant-based options instead. This is a great way to enjoy a backyard barbecue without worrying about red tide.

Seasonal Considerations. Red tide blooms are more common during certain times of the year.

• Peak season: Late summer and fall are typically the peak seasons for red tide in Florida. This is when water temperatures are highest and nutrient levels are often elevated.
• Monitor local conditions: Pay attention to local news reports and advisories from the Florida Fish and Wildlife Conservation Commission (FWC). They provide regular updates on red tide status in different regions.

Staying Informed: Your Red Tide Toolkit. Knowledge is power. Here are some resources to help you stay informed about red tide in your area:

• Florida Fish and Wildlife Conservation Commission (FWC): The FWC website (myfwc.com) is the primary source for red tide information in Florida. They provide maps, reports, and advisories.
• Mote Marine Laboratory & Aquarium: Mote Marine Laboratory in Sarasota conducts extensive red tide research and provides public updates. Their website (mote.org) is a valuable resource.
• Local news outlets: Local news stations and newspapers often report on red tide conditions in their area.
• Sarasota County Red Tide Information: Sarasota County provides specific information and resources for its residents on its website (scgov.net).
• Collier County (Naples) Red Tide Information: Collier County also offers local updates and advisories on its website (colliercountyfl.gov).

Common Mistakes and Pitfalls. Even with the best intentions, it’s easy to make mistakes when dealing with red tide.

• Ignoring warnings: Don’t dismiss red tide advisories. They are issued for a reason.
• Assuming all fish are safe: As mentioned earlier, some species are more prone to toxin accumulation than others.
• Relying on visual cues alone: Red tide isn’t always visible. Use multiple sources of information to assess the risk.
• Thinking cooking eliminates all risk: Cooking reduces, but doesn’t eliminate, brevetoxins.

A Real-World Scenario: The 2018 Red Tide Bloom. The 2018 red tide bloom in Southwest Florida was one of the worst in recent history. It lasted for over a year and caused widespread fish kills, respiratory irritation, and economic damage. During this period, many residents of Sarasota and Naples avoided eating locally caught fish altogether. Those who did chose to consume fish from local waters were extremely cautious, relying on information from the FWC and reputable seafood vendors. This event highlighted the importance of being informed and taking precautions during red tide blooms.

Beyond the Grill: Long-Term Solutions. While individual precautions are important, addressing the root causes of red tide is crucial for long-term solutions. Nutrient pollution from agricultural runoff, wastewater treatment plants, and stormwater runoff can fuel red tide blooms. Supporting policies and initiatives that reduce nutrient pollution is essential for protecting our coastal waters and seafood resources.

Living in coastal Florida means embracing the beauty and bounty of the Gulf, but it also means understanding and respecting its challenges. By staying informed, making smart choices, and supporting efforts to protect our environment, we can continue to enjoy grilling fresh fish without compromising our health. So, fire up that grill, but do it responsibly. Your health, and the health of our coastal ecosystem, depends on it.