Last update with my dwarf puffer for this tread. I've had him close to a year now in my community tank (30 gallons heavily planted with dwarf gouarmi, garra, 6 cardinal tetra, 4 rasbora, 2 peacock gudgeon, and various shrimps) . He is doing great, getting along with everyone and feeds very actively now, even competing with my tetras and rasboras with no problem. Aggression wise, he is just as aggressive as any other fish in my tank. I would say on par with my dwarf gourami. He bothers the tetras every once in while but nothing major (just very slight tail nips). By far my favorite fish out of the tank and a favorite of anyone who sees him! He just follows you everywhere and has this super cute puppy face when hungry. In my oppinion he is a better community fish than some of my other current fish right now in the same tank!
I have been to multiple LFS that carry dwarf puffers and have observed them closely.
It seems like aggression levels are VERY evident and different between batches. There were these one batch that came in and they seemed a little darker in color and were still juvis. These guys were very aggressive and already before being mature were tail nipping/chasing each other. Then there are other batches were all of them seem very docile and nice. My best advice for anyone trying to add a dwarf puffer to an aquarium tank is make sure you have a spare tank just in case it doesnt work out and observe very closely at the particular puffer before buying it. Temperment varies greatly!
I know my tanks stocked pretty full right now, but was wondering from other members if they have had any luck with introducing female puffers in with the males? My lfs got in a batch of puffers that seem very docile so far and I was considering getting two females perhaps to see what will happen. They are full grown for the most part already. Does the male get super aggressive or anything with females present (because of breeding or anything in general?)
One of my theories is there multiple subspecies of dwarf puffers and maybe some people are getting the really aggressive ones? Its amazing how different differnt batches act...