If you eat seafood contaminated with toxins, neurological symptoms may occur and become serious. You can avoid these types of syndromes and physical irritation from a red tide by taking precautionary measures before heading to the lake, pond, or beach. Research shows ocean water can change your skin microbiome, but experts say it's still safe for most people to dive in.
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The Center of Disease Control also released a statement about red tide, warning that brevetoxins can become concentrated in the tissues of shellfish that feed on the algae. People who then eat this shellfish may experience neurotoxic shellfish poisoning, a food poisoning that can be associated with severe stomach problems as well as tingling in fingers and toes. Pets may experience similar health problems if exposed to red tide. The Florida Wildlife Commission, of course, recommends that both people and pets avoid swimming in red tide.
Experts also say that beachgoers should wear shoes to prevent being cut by fish bones. People should also avoid coming into contact with dying or dead marine life as the toxin is already present in their bodies.
If swimmers do get caught in red tide, they should make sure to rinse thoroughly with fresh water. Rinse off pets who are exposed to red tide waters as well.
Avoid swimming near dead fish or animals, as this is an indication that there is an increased amount of toxin in the area. The Florida Department of Health also recommends wearing a particle filter mask to lessen the effects of red tide toxins in the air. For coughing, sneezing and watery eyes caused by red tide toxin, using antihistamines may help. Although the effects of the red tide toxins are known to be temporary, if symptoms do not go away or continue to worsen, people should go to the nearest hospital.
The bottom line, according to the Environmental Protection Agency : "Algal blooms can be toxic. Keep people and pets away from water that is green, scummy or smells bad. Potential controls must not only kill the red tide organism but also eliminate the toxins from the water. To date, this has not been possible; however, researchers are identifying ways to reduce shellfish toxicity. In addition, any control strategy must not harm the environment. In the s, U.
Fish and Wildlife Service and State of Florida scientists used copper sulfate to attempt to eliminate a red tide in coastal Florida waters. Although the copper sulfate killed some of the red tide cells, it led to the release of toxins that, along with the copper sulfate, had negative effects on other marine organisms.
Controls must also be practical. Red tides vary greatly in size — expanding as far as 10, square miles — and can be present from the surface of the water to the seafloor. Presently, there is no practical and acceptable way to control or kill red tide blooms.
Some people experience respiratory irritation coughing, sneezing, tearing and an itchy throat when the red tide organism, Karenia brevis , is present and winds blow onshore. Offshore winds usually keep respiratory effects experienced by those on the shore to a minimum. The Florida Department of Health advises people with severe or chronic respiratory conditions, such as emphysema or asthma, to avoid red tide areas. Swimming is safe for most people.
However, the red tide can cause some people to suffer skin irritation and burning eyes. People with respiratory illness may also experience respiratory irritation in the water. Use common sense. If you are particularly susceptible to irritation from plant products, avoid an area with a red tide bloom. If you experience irritation, get out of the water and thoroughly wash off. Do not swim among dead fish because they can be associated with harmful bacteria. Store-bought and restaurant-served shellfish are safe to eat during a bloom because the shellfish are monitored by the government for safety.
Commercially available shellfish are often not locally harvested and, if harvested locally, are tested for red tide toxins before they are sold. Recreational harvesting of bivalve molluscs such as hard clams, oysters and mussels from conditionally approved or approved shellfish harvesting areas is banned during red tide closures; these organisms may not legally be harvested and, therefore, should not be eaten during any closure of a shellfish harvesting area.
To determine whether or not harvesting of shellfish is permitted in an area, visit the Florida Department of Agriculture and Consumer Services, Division of Aquaculture website. Edible parts of other animals commonly referred to as shellfish crabs, shrimp and lobsters are not affected by the red tide organism and can be eaten. Do not eat the tomalley green stuff, hepatopancreas. During scallop season, locally harvested scallops from open scallop harvesting areas are also safe to eat as long as you eat only the muscle of the scallop and not the whole animal.
In addition, illegally harvested and unregulated shellfish are particularly dangerous and should never be consumed. For example, coquina clams and molluscan predators, such as whelks that feed on toxic bivalves, readily accumulate toxins in their tissues. An illegal harvest is a dangerous harvest.
Yes, it is safe to eat local finfish as long as the fish are filleted before eaten. Although toxins may accumulate in the guts of fish, these areas are disposed of when the fish are filleted. However, it is never a good idea to eat dead or distressed animals, especially in a red tide area, because the reason for the animal's strange behavior or death cannot be absolutely known. No, cooking or freezing does not destroy the red tide toxin.
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