The best replacement for prawn is shrimp.

The best alternatives to prawn are rated as following:
★★★★★  shrimp
★★  lobster
★  jumbo shrimp
★  scampi
★  crawfish
★  shrimp difference
★  crayfish

Your alternative for prawn is not listed? Suggest!
Speaking about prawn, one probably shouldn't forget about salted egg.

Other search terms related to prawn and their ratings are:
★★★★★ salted egg
You have in mind a companion for prawn and it is not yet here? Propose!



Google Trends

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