Largest Reptiles in the World! Discover the giants of the reptile kingdom the biggest and most awe-inspiring species on Earth! 1 Saltwater Crocodile Up to 7 meters / 23 feet The largest living reptile & a top predator of the waters! 2 Green Anaconda Up to 6.7 meters / 22 feet The heaviest snake in the world a true jungle legend! 3 Reticulated Python Up to 6.25 meters / 20.5 feet The longest snake in the world master of stealth! 4 Leatherback Sea Turtle Up to 2.9 meters / 9.5 feet The largest turtle majestic traveler of the oceans! 5 Komodo Dragon Up to 3 meters / 10 feet The largest lizard a powerful predator from Indonesia! Natures giants that rule land, water, and sea!