Give or take 15,000 LOL. Usually happens during a fullmoon or if an oil well dumps millions of gallons of oil into the Gulf. I bet other than that they don't see 15,000 dead anything all at one time. Looks like the levels are as toxic as ever. I wonder if MOP could do a demo and test toxicity of water before and after MOP is used. If MOP can suck up the oil and remove the toxic effects we have a real game changer here!!