The schooling bumblebee goby is Brachygobius aggregatus and it is typical of the "dwarf" bumblebees (as opposed to the larger "common" bumblebees of which B. doriae is typical). It's photographed and discussed in the Aqualog book. The Fishbase article is here:
http/www.fishbase.org/Summary/SpeciesSummary.php?id=11802
The Fishbase size estimate is wrong; these get to about 2 cm. Only the "common" BBGs get to 4 cm, these are things like B. doriae and B. sabanus, which are probably the two commonest species in the trade.
Maintenance is as other BBGs -- hard freshwater or slightly brackish water, lots of live foods, no aggressive tankmates, and enough caves (shells) for each fish to set up home. Yes, they sometimes school, but they also pair off to breed, so plan ahead. Frank Schaefer in the Aqualog book doesn't believe they are traded, and I've certainly never seen them.
Trying to order BBGs to species level is probably a waste of time. As AndyWG says, they are very difficult to identify, and exporters and retailers don't bother. Multiple species get traded, probably even within a single batch of fish.
Cheers, Neale