The Martin County Sheriff’s Office believes a toxic algae bloom is to blame for killing one dog and making six others sick.

South Florida beaches faced a sargassum assault this summer that some scientists believe is part of the largest spread of the nomadic marine weed on record, and one that could continue through September.

EUMETSAT satellite shows blue-green algae bloom covering Lake Okeechobee.

Nearly 4,000 dead fish were counted on Sanibel area beaches and parks.

Gov. Rick Scott's state of emergency could help local officials battle the toxic algae.

We observed large patches of marine macro-algae (Sargassum sp.) floating just offshore, drifting north, and getting stranded on the beach.

Sargassum, a type of marine algae, is washing up en masse on Caribbean beaches, closing them down to the public. The same sargassum is here in Miami, lining Miami beaches.

Heavy mats of seaweed are washing up on South Florida beaches, creating thick barriers to the ocean.

Cold temperatures have started the Fall of the Iguanas and the immobilization of sea turtles, whose bodies have a hard time adjusting to the change in water temperature.