Rest easy! I looked it up, and while the internet is certainly not definitive, it would appear that Cesium 137 is both a Beta and Gamma emitter.
This means you can take your Civil Defense geiger counter along with you to the WalMart and test for Enhanced Shrimp.
The poster who pointed out the Radioactive Shrimp must be treated as radioactive hazardous material is undoubtedly correct. If it’s too “hot” to eat or anything else, it must be disposed of properly.
Someone needs to follow up on that. Should be Amusing, if you just Axe the right questions.
I won’t be surprised if, one of these days, I see someone scanning the seafood AND produce with one, lol!