DO not go with a GSP, Green Spotted Puffer, Tetraodon nigroviridis. For your first one. Get something FW(Fresh Water). They start Fresh and go marine or marine-like when they get older. My largest puffer has been very forgiving to me and my lack of experience with BW(Brackish Water). They eat alot of stuff I eat ! Just a different lets say Race. Shrimp, Crabs, Snails(i do not eat), Mussels, Clamps, Oysters, ETC... From what people on Yahoo.com and Google.com have to say, I would get a RED eye, Red Tail, MBU, Fahaka... Something FW. But then again. I love my GSP's. I also have 6 Dwarf indian puffers in a 30gal tank to them selves. Very easy to take care of. Just my .02 cents.