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

1.8K views · 83 reactions | Alligator snapping turtles—like Grandpa here—can stay submerged for up to 50 minutes! These turtles prefer to sit still underwater for as long as they can. Sometimes they’ll stay submerged for so long that algae starts growing on their shell! | Oklahoma Aquarium | Facebook