Red Tide

Contains adsIn-app purchases
4.5
89 reviews
1K+
Downloads
Content rating
Everyone
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About this app

This app shows a map with recent red tide (harmful algal bloom) measurements for Florida coastal areas.

No registration or login required.

Data source: NOAA National Coastal Data Development Center

Measurements are derived from field samples that are individually collected. Tap "update" in the app to get the most recent data available from NOAA.

The current version of this app covers the state of Florida only.


RED TIDE BACKGROUND INFORMATION
Source: Florida Fish and Wildlife Conservation Commission website

What is a red tide?

A red tide, or harmful algal bloom, is a higher-than-normal concentration of a microscopic alga (plantlike organism). In Florida and the Gulf of Mexico, the species that causes most red tides is Karenia brevis, often abbreviated as K. brevis.

Are red tides red?

At high enough concentrations, red tide can discolor water a red or brown hue. Blooms caused by other algal species can appear red, brown, green or even purple. The water can also remain its normal color during a bloom.

Is red tide a new phenomenon?

No, red tides were documented in the southern Gulf of Mexico as far back as the 1700s and along Florida's Gulf coast in the 1840s. Fish kills near Tampa Bay were even mentioned in the records of Spanish explorers.

How long do red tides last?

Red tides can last as little as a few weeks or longer than a year. They can even subside and then reoccur. The duration of a bloom in nearshore Florida waters depends on physical and biological conditions that influence its growth and persistence, including sunlight, nutrients and salinity, as well as the speed and direction of wind and water currents.

Is red tide in Florida found in estuaries, bays or freshwater systems?

Red tide in Florida can be found in bays and estuaries but not in freshwater systems such as lakes and rivers. Because Karenia brevis cannot tolerate low-salinity waters for very long, blooms usually remain in salty coastal waters and do not penetrate upper reaches of estuaries. However, other harmful algae, including cyanobacteria (blue-green algae), typically bloom in freshwater lakes and rivers.

Why are red tides harmful?

Many red tides produce toxic chemicals that can affect both marine organisms and humans. The red tide organism in Florida, Karenia brevis, produces brevetoxins that can affect the central nervous system of fish and other vertebrates, causing these animals to die. Wave action can break open K. brevis cells and release these toxins into the air, leading to respiratory irritation. For people with severe or chronic respiratory conditions, such as emphysema or asthma, red tide can cause serious illness. The red tide toxins can also accumulate in molluscan filter-feeders such as oysters and clams, which can lead to Neurotoxic Shellfish Poisoning in people who consume contaminated shellfish.

HEALTH AND SAFETY ISSUES

Will I experience respiratory irritation during a red tide in Florida?

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.

Is it safe to swim during a red tide in Florida?

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.
Updated on
Nov 7, 2021

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity, App info and performance, and Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted
4.5
89 reviews
Ronald Giammarco
November 30, 2019
Excellent app as is. Only improvement I can suggest is if there was someway to update changes even more frequently....say daily ....to use to make a real time decision to go to the beach for the day. But bottom line...excellent app!
6 people found this review helpful
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Alexander Holford
September 25, 2021
Ok first, great app works as best as any could. Don't listen to the 1star people they don't understand data mining. It is not the fault of the app that there is no daily updates at every location. The data is only collected in certain areas on certain days, some daily some not. This app puts it all in one place, updated daily when national and local information is given out to the public. So you, the user, who care about your children and pets can have a easy access to available data at hand.
1 person found this review helpful
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Dennis Hill
December 6, 2019
Can't fine all the pages as in the app preview. Also no key to know what the different color dots mean. Installed on a pixel 2xl phone.
2 people found this review helpful
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What's new

Improved support for large screens