I have never had a longnose, but I had a falco for several months. He had more personality than any fish I have ever encountered. I had 2 cleaners, 2 emeralds, and several small hermits that he never bothered. However, as soon as I tried to put a couple peppermint shrimp in to take care of some aptasia he immediately killed them. In the end that is why I traded him out. I wanted to naturally get rid of the aptasia without having to tear apart my rock. Not sure what it was about the peppermints that he disliked so much.