red tide fish kill

Red Tide: Karenia Brevis

In Florida, red tide is caused by the accumulation of Karenia brevis, a type of single-celled organism called a dinoflagellate.  

sargassum

Sargassum: Seaweed or Brown Algae

Sargassum is a type of seaweed, or brown algae, that spends its life on the ocean’s surface and floats in large masses.