yeah the guy said he didnt knwo if he was a nile or a water montior and my husband said they both are basely are the same lol all i know is ive been working really hard on him at first he had an attitude like a nile.. now hes as tame as a puppy dog.. we also use to have a Argus montior that thanks to me is puppy dog tame when he left to his new home they were amazed at how sweet he was...