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[[Image:Chinese_water_dragon.jpg|300px|thumb|right|'''Chinese water dragon''' (Wikimedia Commons)]]
[[Image:Physignathus_lesueurii.jpg|300px|thumb|right|'''Australian water dragon''' (Wikimedia Commons)]]
[[Image:Southeast_waterdragon.jpg|300px|thumb|right|'''Southeast Asian water dragon''' (Wikimedia Commons)]]
Scientific name: ''Physignathus'' spp.
Scientific name: ''Physignathus'' spp.
===Thai or green Water dragon (''P. cocincinus'')===
===Thai or green Water dragon (''P. cocincinus'')===
Adult males may reach 90-100cm in length. They are large bright green lizards with an obvious dorsal crest continuing as a row of enlarged dorsal scales running from the back of the head to the tail. This crest is more obvious in males. There are conical scales at the angle of the jaws and an exposed tympanum. The chin is white and the throat may be yellow or white. The eye is bright amber. Superficially they resemble some of the South American iguanids such as ''Iguana'' and ''Baciliscus'' spp.
Adult males may reach 90-100cm in length. They are large bright green lizards with an obvious dorsal crest continuing as a row of enlarged dorsal scales running from the back of the head to the tail. This crest is more obvious in males. There are conical scales at the angle of the jaws and an exposed tympanum. The chin is white and the throat may be yellow or white. The eye is bright amber. Superficially they resemble some of the South American iguanids such as ''Iguana'' and ''Baciliscus'' spp.