My Goby can beat up your Goby.....lol. If you sit in front of the tank for a minute or two, he will come to the front of the tank right to the glass. As if to say, "What you want!!", and just sits there till you move.
that is great!! we have a clarki that sorta does the same thing he will be swimming around in the tank if you go to the glass to look at his sebea he rushes to it as to say hey this is mine leave it alone as soon as you move he will continue to swim!!!! they all have very funny personalities