yes arrowhead and pig nose are the same puffers just different names they're sold under. I was just saying the name that I always call them!I'm afraid the arrowhead and pignose are prettyich identical I'm assumin one or the other is just a sub species lol I looked into it before purchasing him the pet owner and I had it out about my green striped puffer to which was sold to me as a green spotted but he's really some sort of amazon puffer or so I've read tgo it wouldn't surprise me with this pet shop guy if I did actually purchase an arrowhead instead of a pig nose as I was told he was