Marine Reptiles A to Z
This "rigid swimmer" was closely related to Ophthalmosaurus.
An early "missing link" in mosasaur evolution.
A dinosaur-sized turtle of the late Cretaceous.
One of the last plesiosaurs left before the K/T extinction.
An eel-like predator of the middle Triassic period.
This plesiosaur was named after the documentarian David Attenborough.
One of the last pliosaurs of the late Cretaceous period.
This big-eyed ichthyosaur was a cousin of Ophthalmosaurus.
Guess what state this ichthyosaur was discovered in?
A "pursuit diver" of the middle Triassic period.
An iguana-like reptile of the late Permian period.
A small mosasaur of the Cretaceous period.
The most advanced nothosaur yet identified.
This "basal" pliosaur measured barely ten feet long.
A classic, sleek, long-necked plesiosaur.
This Triassic reptile looked uncannily like a turtle.
A very large--and very ancient--ichthyosaur.
This fierce marine crocodile had a dinosaur-like head.
Guess what city this mosasaur was named after?
A typical pliosaur of the late Cretaceous.
This mosasaur had unusually well-preserved skin.
From head to tail, the longest plesiosaur that ever lived.
A shore-prowling thalattosaur of southern Europe.
This "dawn swimmer" was one of the first mosasaurs.
This "dawn Plesiosaurus" preceded its namesake by millions of years.
This ancient ichthyosaur looked like a modern sawfish.
This ichthyosaur was named after King Arthur’s sword.
The first plesiosaur ever to be discovered in Japan.
This pliosaur was discovered in Cuba in 1946.
This aquatic reptile may have spent its entire life in the sea.
This sleek mosasaur had unusually round teeth.
This mosasaur behaved a lot like a marine crocodile.
The best specimen of this ichthyosaur was destroyed in World War II.
One of the biggest mosasaurs that ever lived.
Along with Eonatator, one of the earliest mosasaurs.
This Triassic placodont looked remarkably like a modern turtle.
One of the first aquatic diapsid reptiles.
This early marine reptile had extra digits in its hands.
This "fisherman lizard" roamed the prehistoric coasts of California.
A common sight in China's Liaoning fossil beds.
A remarkably fish-like lizard of the Jurassic era.
A smallish plesiosaur from New Zealand.
One of the oldest, and smallest, of all marine reptiles.
It made the great white shark seem like a guppy.
A small aquatic reptile of the Triassic period.
A close relative of (you guessed it) Platecarpus.
This pliosaur spent most of its time in shallow ponds.
An Elasmosaurus-like plesiosaur of the late Cretaceous period.
This mean-looking pliosaur was one of the biggest of all marine reptiles.
This aquatic reptile looked like a cross between a plesiosaur and a pliosaur.
A dolphin-like ichthyosaur of the early Cretaceous period.
One of the few plesiosaurs to be discovered in New Zealand.
This pliosaur rivaled Liopleurodon in size.
This reptile helped confirm the theory of continental drift.
One of the most common crocodiles of the Jurassic period.
This "mixed lizard" may be the the missing link of ichthyosaurs.
The first giant aquatic reptile ever to receive a name.
This plesiosaur had an exceptionally slender neck.
The most common ichthyosaur in the fossil record.
"Neptune's dragon" is the earliest identified metriorhynchid.
One of the smallest marine reptiles yet identified.
A slim, fast swimmer with lots of teeth.
This "button lizard" may or may not have been a genuine ichthyosaur.
An ocean-dwelling ichythosaur distinguished by its large eyes.
This Triassic reptile has proven hard to classify.
An early Cretaceous ancestor of modern snakes.
The first identified freshwater mosasaur.
This early marine reptile fed on shellfish.
This "mud swimmer" feasted on squids and mollusks.
This marine reptile was half plesiosaur, half nothosaur.
A turtle-like placodont of the late Triassic period.
This blunt-headed reptile sucked shellfish off the ocean floor.
The most common mosasaur of Cretaceous North America.
One of the rare ichthyosaurs to survive into the Cretaceous period.
This long-necked swimmer set the standard for aquatic reptiles.
A marine ancestor of the modern tuatara.
A large, short-jawed mosasaur of Europe and North America.
A complete skeleton if this giant swimmer was recently found in Norway.
This fast, sleek predator represented the pinnacle of mosasaur evolution.
This plesiosaur gave birth to live young.
A strong-jawed mosasaur of the late Cretaceous.
If a turtle mated with a horseshoe crab, the result might have been this reptile.
One of the most fearsome predators of the Jurassic seas.
This ichthyosaur fed on soft-bodied cephalopods.
The largest ichthyosaur yet to be discovered.
An ocean-going crocodile of the Mesozoic Era.
A close relative of Ichthyosaurus.
A tiny relative of the better-known Mesosaurus.
This long-necked swimmer was a relative of Elasmosaurus.
Its name is Maori for "water monster lizard."
This reptile's long neck looked like a rubber pencil.
A close relative of the long-necked Tanystropheus.
A dolphin-shaped ichthyosaur that gave birth to live young.
Not quite a Terminator, but close enough.
This impressive-sounding plesiosaur was actually very small.
Try saying its name ten times fast.
A speedy plesiosaur of the late Cretaceous period.
A slim, sleek mosasaur of the late Cretaceous.
This "tyrant swimmer" cut a very crocodilian profile.
The most ancient ichthyosaur yet discovered.
The remains of this plesiosaur were dug up in Australia.