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 (Filesnakes) Acrochordus Acrochordus arafurae (Arafura filesnake) Acrochordus granulatus (Little filesnake) Acrochordus javanicus (Javan file snake) Dipsadinae Farancia Farancia abacura (Mud snake) Farancia erythrogrammus (Rainbow snake) Helicops Helicops angulatus (Brown-banded water snake) Helicops infrataeniatus Helicops scalaris Hydrops Hydrops triangularis Leptodeira Leptodeira rubricata (Costa Rican cat-eyed snake) Pseudoeryx Pseudoeryx relictualis Tretanorhinus Tretanorhinus nigroluteus Tretanorhinus variabilis Grayiinae Grayia Grayia smythii (Smith's African water snake) Homalopsidae (Bockadams) Bitia hydroides (Keel-bellied water snake) Cantoria violacea (Cantor's water snake) Cerberus (Dog-faced water snakes) Cerberus australis Cerberus dunsoni Cerberus microlepis Cerberus rynchops Cerberus schneiderii Djokoiskandarus annulata (Banded water snake) Myrrophis Myrrophis bennettii (Bennett's mud snake) Fordonia leucobalia (White-bellied mangrove snake) Myron Myron karnsi Myron resetari Myron richardsonii Hydrophiinae (Sea snakes) Aipysurus Aipysurus eydouxii (Spine-tailed sea snake) Aipysurus laevis (Olive sea snake) Astrotia stokesii (Stoke's sea snake) Disteira Disteira major (Olive-headed or greater sea snake) Disteira nigrocincta Disteira walli (Wall's sea snake) Enhydrina schistosa (Beaked sea snake, hook-nosed sea snake, common sea snake, Valakadyn sea snake) Enhydrina zweifeli (Sepik or Zweifel’s beaked seasnake) Hydrophis Hydrophis belcheri (Faint-banded sea snake, Belcher's sea snake) Hydrophis bituberculatus (Peters' sea snake) Hydrophis brooki Hydrophis caerulescens (Dwarf sea snake) Hydrophis cantoris Hydrophis cyanocinctus (Annulated sea snake, blue-banded sea snake) Hydrophis fasciatus (Striped sea snake) Hydrophis gracilis (Graceful small-headed sea snake, slender sea snake) Hydrophis inornatus (Plain sea snake) Hydrophis klossi (Kloss' sea snake) Hydrophis lapemoides (Persian Gulf sea snake) Hydrophis mamillaris (Bombay sea snake) Hydrophis melanocephalus (Slender-necked sea snake) Hydrophis obscurus (Russell's sea snake) Hydrophis ornatus (Ornate reef sea snake) Hydrophis semperi (Garman's sea snake) Hydrophis spiralis (Yellow sea snake) Hydrophis stricticollis (Collared sea snake) Hydrophis viperinus Kerilia jerdonii (Jerdon's sea snake) Kolpophis annandalei (Bighead sea snake) Lapemis Lapemis curtus (Shaw's sea snake) Lapemis hardwickii (Hardwicke's spine-bellied sea snake) Laticauda Laticauda colubrina (Colubrine sea krait, yellow-lipped sea krait) Laticauda laticaudata (Blue-lipped sea krait) Pelamis platurus (Yellowbelly sea snake, pelagic sea snake) Thalassophis Thalassophis anomalus (Anomalous sea snake)
Sea turtles
Dermochelyidae
Dermochelys coriacea (leatherback sea turtle)
Cheloniidae
Caretta caretta (Loggerhead sea turtle) Lepidochelys kempii (Kemp's ridley) Lepidochelys olivacea (Olive ridley) Chelonia mydas (Green sea turtle) Eretmochelys imbricata (Hawksbill sea turtle) Natator depressus (Flatback sea turtle)
Extinct
From the Permian to the present day there have been numerous groups of extinct reptiles that adapted to life in the marine realm: