So what the frig is that thing? According to the U.S. Fish & Wildlife Services:
The alligator gar is the largest of seven species of gar found in North America, Central America, and Cuba. The largest one on record came from the Rio Grande River in Texas and is an IGFA All-tackle World Record weighing 279 lb 0 oz. However, historic observations and photographs suggest they can attain weights and lengths of up to 350 lbs. and 10 feet in length. This species, the largest in the Mississippi River Valley, once had a range that spread across most large river systems and tributaries from the Gulf of Mexico states of the U.S. and Mexico upstream into the Ohio River Valley. Alligator gar prefer large rivers that have a large overflow floodplain, but these rivers have all but disappeared in North America due to the use of dredging, dams, dikes, and levees.