It's very difficult. To replicate the environment that prawns come from, which is very deep water, the temperature needs to be exact—to literally the degree. The salinity needs to be 21 parts per million. It needs to be oxygenated water. Prawns are very temperamental once they are brought to the surface. It is possible to keep them live in holds of water, but doing so any longer than a day becomes increasingly difficult. I do know of people being able to do it for a few days, but it is a very delicate process.
On May 3rd, 2021. See this statement in context.