The best replacement for prawns is shrimp.

The best alternatives to prawns are rated as following:
★★★★★  shrimp
★★  crawfish
★  crayfish
★  scampi
★  jumbo shrimp
★  shrimps

Your alternative for prawns is not listed? Suggest!
Speaking about prawns, one probably shouldn't forget about honey walnuts.

Other search terms related to prawns and their ratings are:
★★★★★ honey walnuts
★★★★★ black bean sauce
★★★★★ noodles
You have in mind a companion for prawns and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of prawns in all years. Click on graph for more.
prawns
shrimp
crawfish