Issa / Prawns is sold as it is, you can have it cleaned with tail on / head off or fully cleaned.
Prawns are incredibly rich in two vital minerals: zinc and selenium. Zinc helps regulate the oil-producing glands in the skin and the immune system. Selenium that protects you from reactive oxygen species
NOTE : APPROX WASTAGE FULLY CLEANED 60%, CLEANED TAIL ON 50%, HEAD OFF 40%