Hawks do love shrimp. Mine bit a cleaner and sucked several hermits out of their shell while he was looking at me. There are several hermits still in with him that he has not bothered in the past year.
well i have had a cleaner shrimp in with a hawk with no problems. no sign of aggression towards the shrimp. but, if u are going to do it, i suggest buying a shrimp that is larger then ur hawkfish