No no no no no no. In case you missed it NO.lol Pet store are notorious for that. I walked into a store once and saw a skink being eaten by a kingsnake. The idiot in the petstore didnt realize that kingsnakes eat lizards.
They come from 2 different localities, although could be an Ausie legless lizard too i guess. But if im not mistaken legless lizards live in a drier climate than a water dragon. Its just not a good thing. bad enough that they keep multple numbers of the same species, yet alone different ones. Different bacteria tollerances too.
Don't forget ReptileFest April 3rd-4th