If he has lots of small hiding places to go when the other fish is in hot persuit of him he should be ok till grows up and then turns on them for being meen to him. They can burry fast in the sand it is incredible you can always put him in a fuge till he is adult. But who know how long that would be and it would not be fare to him if it were a year or more. I have contiplated one a few times I just don't want to loos the smaller fish I have when it getts larger. they are not a huge fish but large up to 12 inches, groupers can get larger. The more I think about it he is different enough that they very well will not care about him. It is a hard call catching him once burried is easy. You just have to watch where he burries himself and when you net him take a bunch of sand with him. That is how I net gobies that burry work all the time and they don't seem to care to much.

Bill