To be the voice of reprimand in this situation.
If you cannot prevent yourself from handling your fish when there is no good reason to other than for purely selfish motives and you risk damaging it at least by touching it's delicate skin. If you then still couldnt stop yourself and you had to learn the hard way by killing your own pet.
Perhaps another mudskipper isnt for you?
I know I wouldnt sell you one.