that. already this month, we ve seen this shark possibly a great white, lurking right next to a fishing boat right there. this 14-foot great white was tagged there a few years ago and was just detected near virginia s coast on sunday. cape cod first responders now training for shark attacks, and posting these signs warning beachgoers. experts say the growing seal population, what the sharks feed on, is to blame. the probability of a shark attack is extremely low. but it doesn t mean you don t use common sense when you re going into the ocean. reporter: they re hoping to avoid scenes like this. people screaming to get out of the water at this alabama beach two weeks ago, spotting sharks in the shallow water. and tom, experts say there are a few things you can do to avoid sharks on the beach. swim on sunny, clear days, but not at dawn or dusk. that s when sharks feed. tom? a good time to stay out of the water. all right, gio. thank you. when we come back, the new fireworks warn