» Sat Jul 07, 2012 8:01 am
"Argonian appearance ranges from reptilian to almost human; this is decided by the amount of Hist sap they ingest as hatchlings, which ceremonially takes place on their Naming Day. Ancient cave paintings depict figures which appear to be more tree-like than Argonian."
"While Argonians appear reptilian in nature at first glance, they also exhibit qualities of fish and amphibians: they are able to breathe underwater through small gills behind their ears, and swim using the same method as that of a tadpole or eel by moving their tail side-to-side to propel through the water. "
http://www.uesp.net/wiki/Skyrim:Argonian