Well I had one come in my store recently, (allen)batrachus grunniens and I had it at a SG of 1.010 and it was doing real good, and I just found out today someone sold it, and the person who bought it is either putting it in What he thinks is brackish (because he had african cichlids previously) or hes putting it in a brand new, uncycled brackish tank (if he knew how to setup brackish for that matter, he might not have even used marine salt). I know this because the person who bought it was begging me to sell it to him the other day when it came in, and I refused. I told him it needs brackish and it wont live in your African cichlid tank. So he either just ignored me and threw it in anyway, or he attempted to make his tank "brackish" overnight.
I am pretty pissed. I really didn't want that fish to sell when I wasn't in the store. I am the only one who really knows about brackish, and I have been the one maintaining our brackish tanks, but it sold over the weekend while I wasn't there.
He also took the Jade Goby and the Scat we had in with him, so all three fish are probably not going to end up too well.