Further to my post,Why Some Stingray have Ammonia, Urine or Urea Smell – How to get rid of it?, last weekend, I asked my regular fishmonger, where is the best place to smell a sting ray for foul urine or urea. He told me that since the leakage is cause by improper gutting which resulted in urea flowing from the kidney and glands into the fish flesh, the best place to smell is at the location shown by red arrows in the photo above. The arrows show the nearest part to these organs before they gut it and cut out the mid portion of the sting ray. Hope this tips are helpful in helping you to choose 'urine/urea' smell free stingrays!
Happy Weekend and Happy Marketing!