where you see dead fish. >> reporter: this is an algae bloom we saw in tampa bay, not known if its related. experts say the bay's restored sea grass could also be in danger, a food source for all manner of sea life, including florida's threatened manatee. >> we did the hard work to bring this bay back and have been in international recovery success story. so it's frustrating to see lost ground. >> reporter: a red tide took a devastating toll on the region three years ago. in this case, scientists say the impact won't be known for weeks or months. janet shamlian, cbs news, tampa bay. >> diaz: next on the "cbs weekend news," a hometown hero celebrate after a history-making game.