ive kept neon gobys before,, pretty tough lil fish and do a good job, mine would ride the tangs around the tank,,, was a riot watching the cleaner shrimp clean them, first time i seen it i was like ohhh no the shrimps eating one of the gobies,, the shrimp had it in multiple legs upside down looked like a spider spinning a fly in its web.. then it just let go and the goby went on with its business,,, after that initial oh nooooo it was fun to watch that