Blue-Green Algae in Delaware

Blue-green algae blooms may occur during warmer months in Delaware’s ponds, lakes and other slow-moving freshwater areas such as the upper parts of rivers. While there have been no reported illnesses in humans or animals in Delaware, blue-green algae blooms can have harmful effects, so it is important to be aware.

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Macroalgae in Delaware’s Inland Bays

The water quality of Delaware’s Inland Bays is very important to outdoor recreational activities available for Delawareans and visitors alike. The Assawoman, Indian River and Rehoboth Bays provide a superb venue for fishing, boating, waterskiing and other related outdoor activities. However, like so many natural resources, these areas also suffer from the negative effects of

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What is a Red Tide?

“Red Tide” is the common term for a particular type of harmful algal bloom made up of large concentrations of toxic red dinoflagellates called Karenia brevis (K. Brevis). These are tiny red-colored, naturally-occurring aquatic microorganisms which, in sufficient concentrations, can cause a reddish tint to the water. At very high concentrations, they can cause toxic

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