I have read mixed reports on keeping them with puffers. From experience, I know they do much better in brackish water. My bb gobies in freshwater slowly died over a 6 month period in which other fish were fine. Once I set up a BW tank for some, they were active! The bb goby does breed in FW
, that's what it evolved to do. Since they are from an estuary environment, their life cycle involves both FW
and BW. Their juvenile stage is spent in FW
and their adult life is in BW. They spawn after the monsoons, when the water is fresh. IMO
, stick with what Mother Nature intended and keep adult bb gobies in BW. In addition, they prefer cooler water.