VIDEO: Two shrimp boats are at the bottom of the St. Johns River after a fire early Tuesday morning. The fire broke out sometime before 4 a.m., sending the 69-foot Triton II and the 40-foot Iris Marie up in flames. The Iris Marie sank into the St. Johns River about an hour after firefighters arrived. The Triton sank just before 8 a.m. No injuries have been reported so far, but one shrimper who used to work on the Triton said it was difficult to watch. “It’s the first time I’ve seen a boat on fire period," Corey Knoff said. "It’s hard because that’s the first boat I ever worked on when I first started commercial fishing.” Capt. Mark Vlaunn of the U.S. Coast Guard Sector Jacksonville said the immediate concern now is pollution. Crews are waiting for an oil bloom to arrive so they can clean up any fuel that was on board.