it looks like the Siberian Sturgeon , Acipenser Baeri, Reaches a maximum length of 2m ( 6'6" ) and 200 kg in the wild. think you might need a pretty big tank for that baby
wow, that's one cool sturgeon! 1st time i see one. funny thing is, i live by a river that have alot of those and this is the 1st time i see someone with one. congrats on finding one