He may or may not like them but you can certainly try - although just keep them as a treat and not a regular thing as some prawns are in quite a salty liquid which would not be good for him. However, if they are totally fresh this would be far better. If you discover that he does like them and at some time in the future you need to give him medication in the form of a tablet, you can put a small slit in the prawn and push the tablet inside.
Some of my cats love them and some just turn their noses up - but, as you will find out for yourself, that is a "cat thing".
Animal welfare volunteer. Owner of 6 cats.