3. Skin

Check the skin of the prawns. Skin that is still tightly attached indicates freshness, while skin that has begun to peel or detach could be an indication of prawns that have been harvested for a long time.

Other tips 

4. Fresh or frozen

If possible, choose fresh prawns over frozen. Fresh shrimps tend to have better flavor qualities than frozen ones.

5. Odor

Fresh prawns should not have a fishy or foul odor. A strong odor can be a sign that the prawns is no longer fresh.

6. Color

Choose prawns with bright and clear colors. Avoid prawns that have a brownish or dull color, as it could be a sign that the prawns are no longer fresh.

7. Red or black spots

Avoid prawns that have red or black spots on their bodies. This could indicate infection or damage to the prawns.