Following is a list of marine reptiles, reptiles which are adapted to life in marine or brackish environments.
Extant
The following marine reptiles are species which are currently extant or recently extinct.
Crocodiles
:*Crocodylus
::Crocodylus acutus (American crocodile)
::Crocodylus porosus (Saltwater crocodile)
Lizards
:*Iguanidae
::*Amblyrhynchus
::::Amblyrhynchus cristatus (Marine iguana)
:*Varanidae
::*Varanus
::::Varanus indicus (Mangrove monitor)
Snakes
:*Acrochordidae (file snakes)
::*Acrochordus
::::Acrochordus arafurae (Arafura file snake)
::::Acrochordus granulatus (Little file snake)
::::Acrochordus javanicus (Javan file snake)
:*Dipsadinae)
- ?Actiosaurus
Crocodylomorphs
- Thalattosuchia: Early Jurassic - Early Cretaceous
:*Metriorhynchoidea
::Eoneustes
::Teleidosaurus
::Zoneait
::Aggiosaurus
::Dakosaurus
::Enaliosuchus
::Geosaurus
::Metriorhynchus
::Neustosaurus
::Purranisaurus
::Teleidosaurus
:*Teleosauridae
::Machimosaurus
::Pelagosaurus
::Platysuchus
::Teleosaurus
::Steneosaurus
- Tethysuchia: Middle Jurassic - Early Eocene
:*Pholidosauridae: Middle Jurassic - Late Cretaceous
::Elosuchus
::Oceanosuchus
::Terminonaris
:*Dyrosauridae: Late Cretaceous - Early Eocene
::Arambourgisuchus
::Atlantosuchus
::Dyrosaurus
::Guarinisuchus
::Phosphatosaurus
::Rhabdognathus
- Gavialoidea: Late Cretaceous - Recent
:Eothoracosaurus
:Thoracosaurus
:Eosuchus
:Argochampsa
:Eogavialis
:Ikanogavialis
:Piscogavialis
:Siquisiquesuchus
:Gryposuchus
:Aktiogavialis
Testudines
- Chelonioidea
:Allopleuron
:Archelon
:Pneumatoarthrus
:Protostega
- Araripemydidae
:Araripemys
- Bothremydidae
Thalattosaurs
- Agkistrognathus
- Anshunsaurus
- Askeptosaurus
- Concavispina
- Clarazia
- Endennasaurus
- Gunakadeit
- Hescheleria
- Miodentosaurus
- Nectosaurus
- Paralonectes
- Thalattosaurus
- Wapitisaurus
- Wayaosaurus
- Xinpusaurus