Mine has never bothered any of my 5 shrimps but the fish is small and the shrimps are nearly the same size. Even some baby bangaii cardinals were not touched by it. Recently it has taken to perching on a Tuxedo Urchin that has crawled up onto the hawks favourite circulating pump perch.
My Falco Hawk, on the other hand, managed to take a small anemone shrimp I was stupid enough to put in the tank (I am now keeping the other one I purchased in a second tank until it is a lot bigger) and will happily rid the tank of baby bangaii if I don’t get to them first.
Steve