They the two belong into the crustaceans of ‘decapod’ (meaning they've got ten legs), but shrimp are through the species Pleocyemata As to your peas, you’ll thaw them prior to introducing them on the combination. And Take note, You can utilize canned, drained peas instead but I come across them https://jaredhxndq.thelateblog.com/32291938/details-fiction-and-shrimp-for-sale-aquarium