List of largest reptiles

It is worth mentioning that unlike the upper weight of mammals, birds or fish, mass in reptiles is frequently poorly documented, thus subject to conjecture and estimation.

[2] Larger specimens have been reported albeit not fully verified,[3] the maximum of which is purportedly 7 m (23 ft) long with an estimated mass of 2,000 kg (4,400 lb).

Until 2024, the largest ichthyosaur was believed to be the Late Triassic species Shastasaurus sikanniensis, at approximately 21 m (69 ft) long[88][89] and 81.5 t (180,000 lb) in weight,[90] from the Norian stage in what is now British Columbia.

[92][93] The specimen was referred in 2024 to Ichthyotitan severnensis, with revised estimates of 25 metres (82 ft) making it the largest known marine reptile.

Based on crown diameter, the animal was about 18 m (59 ft) long and weighed 55 t (121,000 lb), making it one of the largest marine reptiles ever.

[117] A Mesozoic reptile is believed to have been the largest flying animal that ever existed: the pterosaur Quetzalcoatlus northropi, from North America during the late Cretaceous.

The Green anaconda is the most massive living snake.
The Indian rat snake is among the largest species in the family Colubridae .
The King cobra is the longest venomous snake in the world.
The Eastern diamondback rattlesnake is one of the heaviest venomous snakes in the world.
The Komodo dragon is the largest living species of lizard in the world.
The Blue iguana is the most massive extant iguana .
Skeletal mount of Mosasaurus , the largest known mosasaur and squamate.
Fossil remains of an Ichthyosaur , a prehistoric giant marine reptile.
The giant leatherback sea turtle, the largest extant turtle, digs a nest on the beach.
The Alligator snapping turtle is the largest extant freshwater turtle in North America .
The Galapagos tortoise is the largest living tortoise .
The Arrau turtle ( Podocnemis expansa ) is the largest of the side-necked turtles.
Skeletal mount of Archelon , which is considered as one of the largest turtles to have ever existed.
Skeletal mount of a Plesiosaur .
The Saltwater crocodile is a formidable apex predator throughout its range and is considered to be the largest extant crocodilian.
Gharials are long, narrow-snouted crocodilians, and are among the largest species.
The American alligator is among the largest in the family Alligatoridae .
Deinosuchus (fossil specimen), one of the largest crocodilians to ever exist.
Skeletal reconstruction of Sauroposeidon proteles