dragon goby

From reading I’ve been doing, it’s a smaller version of the violet goby that’s able to tolerate freshwater better but does not tolerate full marine setups as well. Seems like each species is pretty similar looking or the image search is only revealing gobioides broussonnetii. If you’ve had the...

I am looking to get a dragon goby for a 40 gallon tank. The tank already contains two peacocks and 2 mbunas a blood parrot and a callychthys cat. I also have a Senegal bichir, about 6 inches in a 20 gallon. Which would it be better with?

So I've got a Dragon Goby, 2 Angelfish, 1 Pleco, 1 Pictus Catfish, and a Crowntail Beta. Betta? Hmm... but anyways they are all doing great together. What size tank should I be looking at for an end product here? Substrate? I want a really natural lookIng tank. Thanks guiseeeeeee