I love dragon gobies I used to have 3 they were in freshwater. All 3 were rescues from people who got them from walmart because they looked cool but had no clue about how to care for them and since I had always wanted them I knew what they needed so I explained it to them and they said I was a better home for them and I had a new fish. I had planned to transition their tank to brackish but I was forced out of the hobby before I could. They were coolest at feeding time I'd add the brine shrimp and all 3 would come out and puff themselves up and bounce around to show they were the biggest and should get 1st dibbs on the food