They both equally belong to your crustaceans of ‘decapod’ (that means they have got 10 legs), but shrimp are from your species Pleocyemata Shrimp also have their largest claws on the front legs, even though prawns have the largest types on their own 2nd set of legs. In that area https://beckettptsqm.alltdesign.com/detailed-notes-on-shrimp-tienda-51693772