Florida Democrat Andrew Gillum's gubernatorial campaign is out with a new spot that centers on the state's algae bloom crisis, which has wreaked havoc on waterways and become a key political issue in the state. 

Gillum's new spot pans across green-tinted coasts and dead marine life as the Democrat laments how "the toxic air, red tide and algae blooms around Florida are an economic and environmental disaster." 

"No corporate profit is worth sacrificing our clean air and water. But it's not going to end until we take back our state government from special interests who are only interested in short term profits, not our health or our jobs," he says. 

"As governor, I will protect our clean air and water, not corporate polluters."

The ad shows how the algae crisis remains a key issue in the gubernatorial race between Gillum and Republican Rep. Ron DeSantis. Multiple Florida primary voters told NBC News this past August that it was the top issue determining their vote, and since the crisis is still going, those same voters could still feel that main motivation come November.

DeSantis's selling point to these "algae voters" was that he was a Republican who showed a desire to fix this problem—taking on the "Big Sugar" lobby who some blame for the crisis while using water policy as one of his closing primary arguments against Agriculture Commissioner Adam Putnam.

While this ad doesn't directly mention DeSantis, it shows Gillum trying to claim the issue for Democrats by painting it as part of the larger argument over special interests. And it plays into the arguments made by his running mate, Chris King, who was a vocal detractor of the sugar industry during the Democratic primary.

Along with this ad, Gillum is campaigning Tuesday in Siesta Key to highlight the issue.