Oh - in that case, yes I'd move them if you can do so by moving the shells they are in. Just make sure that you move as much of the water as possible, substrate, decor, etc. as well as the filter they are using right now, to prevent cycling. Wouldn't hurt to add a bacteria supplement to the new tank also, if you haven't had any other fish in it to cycle it out. If you wait for the smaller babies to grow before you move them, you're probably going to have the same situation with a younger spawn anyway.