At 150 pounds, the alligator snapping turtle is a formidable presence in the waters of the bayou. You don't want to run into this type of turtle while out and about. A mini-marathon of America's Mississippi starts tonight at 8 PM! | Smithsonian Channel

2.1M views · 12K reactions | Alligator Snapping Turtles are the heavyweight champs—growing more than 200 pounds and living up to 70 years. #AmericasWildFrontier | National Geographic Animals | Facebook

Alligator snapping turtles get their name from their powerful jaws and the ridges of their shells that resemble alligator skin. Medusa, our resident alligator snapping turtle, enjoys spending most of her time in the water, buried in the mud. She can hold her breath up to three hours which is why you may not see her during your visit! | Gulfarium Marine Adventure Park

4.9K views · 156 reactions | And the mystery species is...... ALLIGATOR SNAPPING TURTLE! That up-close view is of their famous tongue. Notice how they open their jaw wide and wriggle the tip of their tongue and wait to snap their prey. Such an amazing fishing technique! | Riverbanks Zoo and Garden | Facebook

An alligator snapping turtle was just discovered in a Southern Illinois creek. It's the first time the creature has been spotted in the state in three decades: http://cbsn.ws/2iUxLlG | CBS News