The first thing you need to consider when freezing prawns is the type of prawn you are freezing. There are three main types of prawns: warm water, cold water, and deep sea. Warm water prawns are the most common type and can be frozen safely. However, cold water and deep sea prawns should not be frozen as they may contain toxins that can make you sick.

The next thing you need to consider is how you will freeze the prawns. There are two main ways to freeze prawns: individually or in packets. If you choose to freeze them individually, make sure they are properly sealed in an airtight container or bag. If you choose to freeze them in packets, make sure the packets are tightly sealed and do not allow any air inside them. This will help prevent freezer burn from occurring.

Finally, you need to consider how long you want to keep the prawns for. Freezing them for a short period of time (up to two months) is generally safe, but if you want to store them for longer than that, it's best to cook them first.