I'm with fio1022. I had a longnose, LOVED THAT FISH!!! didn't bother anything. Found him dried up on the floor. Jumped out thru a crack in top.
Replaced with Flame. A bit of a suspicious character. Doesn't actively bother anything. Alot of personality! BUT I have had a few things "go missing". A peppermint shrimp, all of the legs on an emerald crab and a very small twinspot goby. H doesn't bother larger shrimp (2 cleaners, 2 fire, 2 larger peppermints). A
Also, if you add the larger more decorative shrimp first that's supposed to decrease his likelihood of thinking that they are snacks vs he' in there world.
Trial and error. Just don't get used to any shrimp cause they might be on borrowed time.