any ways now to help you...
so do you have just one or more? (hang on to them for dear life)
they will be happy with pictus's etc, but occasionally will fight with others of the same species.
they are quite vocal (even more so than pictus's who croak all the time; least they did with me).
but im amazed you got one that small, as bumblebee gobies are usually 2-3 cm long. how big was he/she when you got it?
do you have a pic?