(CNN) As the red tide continues to move northward along Florida’s east coast, a new breakaway bloom is moving through the Keys.

Counties across the state have been dealing with the Karenia brevis algae, and the marine life it’s killed, for months. Now, Indian River is the latest Florida county forced to close its beaches because of red tide.

And on Tuesday, Brevard County’s Melbourne Beach, Indialantic and Cocoa Beach also confirmed their waters, too, have tested positive for medium levels of the toxic algae. Officials said their counties’ beaches would remain open, but signage would be put up warning of red tide’s presence.

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