i know thats a bumbleebee goby seeing as how mine looks the same, but mine thrives in my strictly freshwater tank. Maybe they do need low end brackish, but mine has done fine in freshwater
Not really, I can only tell a couple of species apart. I can tell you that BBGs don't need brackish water though.
Personally I've had better experience with BBG's in brackish water. The ones I keep in freshwater keep fungusing up. I've never had any disease problems in brackish with them.