We’ve heard of fossilfuels, but until we spotted a press release from Ohio, we’d never heard of a fossil fish. Ohio Gov. Mike DeWine has just signed a bill into law designating the fossil fish species Dunkleosteus terrelli (a mean-looking critter) as the official Fossil Fish of Ohio. Dunkleosteus is the second fossil animal and third geologic state symbol to be added to Ohio’s list. The new official Fossil Fish can be found in (you guessed it)…shale deposits.