It is essential to check the body and colour of the shrimp to understand whether it is fresh or not. If the shell of the shrimp is thick and hard, then the shrimp is fresh. Also check the legs of the shrimps if they are not very loose, you can be rest assured that the shrimps are fresh. However, commercially treated or packaged or frozen shrimps often have soft shells after being frozen, thawed and then frozen, this process reduces the freshness of shrimps and makes the shells soft. Thus, it is best to go for fresh shrimps.