It might be time to revisit prawns. Good prawns are gorgeous, well worth the price you pay for them. Cheap prawns, well, there is no such thing as a bargain when it comes to prawns. KNOW WHAT YOU ARE BUYING. I can’t say it any louder than that.
Read all about prawns here. https://sharedkitchen.co.nz/2016/06/prawns-what-to-look-for/