It could be two weeks before state officials know for certain what killed an estimated 2 million fish in the Chesapeake Bay.
Or, they may never find out the exact cause.
Biologists with the Maryland Department of the Environment sent tissue samples from the fish, mostly juvenile spot 3- to 6-inches long, to state labs to pinpoint the reason they died. But for now, they believe a rapid drop in temperature in December caused cold-water stress, said MDE spokeswoman Dawn Stoltzfus.
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