You may be surprised that the largest, freshwater fish in North America may be swimming in the Mississippi River under the I-20/Hwy. 80 bridges at Vicksburg as you are reading this. The Alligator Gar is a monster-sized fish, capable of exceeding 300 pounds described as a beautifully grotesque fish in Mark Spitzer’s book “Beautifully Grotesque Fish of the American West.” Many scientists refer to Alligator Gar as a “living fossil” because they have remained relatively unchanged for over a 100 million years. The broad snout and double row of upper teeth resemble an alligator, hence their name.
During most of the 1900’s, Alligator Gar were considered a “trash fish,” essentially useless, and possibly damaging to the environment, similar to carp. Because of their size and voracious appetites, fisherman assumed they were eating their prized sportfish, like Largemouth Bass, crappie, and Bluegill. They were targeted for elimination by state wildlife agencies and the numbers of Alligator Gar quickly diminished. More recently, scientific studies have shown that this species primarily eats forage fish, like Gizzard Shad, and also occasionally enjoys an unwary duck or a feisty beaver swimming along the surface.
Modern ecology has warned us not to eliminate apex predators from the environment without unintended consequences. Maybe that is one reason invasive carp continue to spread throughout the Mississippi River basin – there are no natural predators large enough to consume that many carp to make a difference in their growing numbers, except maybe the Alligator Gar. Now, state and federal agencies are stocking these fish back into their native ranges and numbers are steadily increasing…