Ok - that is a good looking lung fish. Congrats! I think about mine a lot. Stupid decision on my part - a realtor.... anyway, lungfish all look the same to me - the African/South American. Mine was deep gray with light spots and was an African, but there are a few varieties. Maybe someone else can help you ID. The African is the most common so it is most likely an African variety. Good luck, man. They are super easy fish. And don't think you can put cool tiny fish in with them, because that is one of the mistakes I did in the beginning. I thought hey, why not neon tetras? So I put like 30 in there and it looked cool but guess what, they - the group - started picking on my helpless lovely African lungfish. My lfs owner said that happens - when you get a school of tiny fish, can be 3 can be 20, etc - they will pick on a larger inhabitant. So = it's best to keep him a lone and if you want more in your tank, then simply get another tank for your lungfish. If money is a concern, like I said, Petsmart has good deals and Petco has yearly sales on tanks. Just can't get too many large tanks in Petco/Petsmart in certain areas for some reason. Here, like I said, where I live now, I can get a 150 or 125 tomorrow, but when I move it is only 75 and they won't even consider ordering you a larger one. Cheers!!