i tried the neon goby, neither one survived. i had them in their own 30g tank (now my lion tank) and i had some rock in there, sand, everything. i acclimated them properly, but one wouldnt eat and died. and since one died, the other wouldnt eat. so then that one died too. maybe i just had some bad luck.
but i have heard yellow head jawfish are easy to breed.
you can get already mated pairs at
Sea Life Inc.