HAB General Information
This section defines harmful algal blooms and red tides.
A harmful algal bloom (HAB) is the proliferation of a toxic or
Florida red tides occur almost every year in the Gulf of Mexico. The Florida red tide organism, Karenia brevis, produces a toxin that can kill marine animals and affect humans. Scientists have studied this organism for more than 50 years.
Report a fish kill or other wildlife effects, consult health authorities about human exposure, or locate other resources.
Karenia brevis, the Florida red tide organism, produces brevetoxins, toxins harmful to fish, marine mammals and birds.
Taxonomists revise species descriptions and classifications as
scientific techniques improve. Karenia brevis, the new name for
Florida's red tide organism, has undergone several taxonomic
Cyanobacteria, or blue-green algae, are commonly found as individual cells, clumps, filaments or large mats in Florida's lakes, rivers and estuaries.
Find out how dust from the Sahara Desert fuels annual Trichodesmium
blooms in the Gulf of Mexico.