Well put (and incidentally, welcome to the Forum!). There really isn't "a" bumblebee goby in the hobby, but several, and few of them are easy to identify. The name you see in the book -- Brachygobius xanthozona -- is simply bogus. That species is (I am reliably informed) so incredibly rare few museums have specimens, let alone aquarium shops.
So while, broadly, I would go along with
AMS's advice, this is more because as a default slightly brackish seems to do no harm, whereas keeping the common species in freshwater doesn't always work. That said, I have one specimen in a soft, acid aquarium that seems to be doing fine. She's fat, happy, and tame enough to hand feed. She actually comes to the top of the tank and waits for me to drop bloodworms into her mouth.
The flip side is that three of these gobies died. I also lost a few other goby species in this tank within a few months, but for the last 6 months none have died. So while I suspect a bacterial infection was to blame, going from one goby species to the next, I can't rule out improper water chemistry.
To be honest, there's a lack of good data on gobies in aquaria generally. The Aqualog book is a step in the right direction, and Naomi Delventhal's chapter in my brackish book is even better. But beyond that, there's a lot that's conflicting and based on hearsay rather than experience. I prefer to listen to the scientists and the aquarists that have bred them rather than bother with the stuff in most books.
Cheers,
Neale
There are several species of Bumble Bee Gobies, some of which are still not yet imported. Generally split into two groups. While they all remain small, one group is classed as dwarf, not growing more than about 1.5cm. Look for Brachygobius mekongensis in the specialist shops, this is a completely freshwater species. Whilst it can be maintained in slightly brackish water, it is a true freshwater species. Not quite as attractive as B.doriae, but still has all the character.