I never touch shellfish but I do like prawns and any other kind of fish. My wife had a prawn curry on holiday, dramatically sick, thankfully shes pretty strong and recovered quickly back to normal in 24 hours
After a miserable couple of days in a tent in Brittany many years ago, I've never touched another oyster, nor eaten any mussels. The rest of the family love their moules frites.
I do generally enjoy seafood and have never been ill. I read online oysters should be plump and juicy, the one I had was skinny, floppy and watery. It wasn’t nice to eat. I am more or less ok now though but have learned my lesson and won’t repeat.
I love oysters, especially the Sydney ones and the Coffin Bay ( South Australia) ones. Beautiful with lemon and black pepper. When we lived in Tasmania we used to collect them from a local estuary and pig out on dozens of them. Oysters Kilpatrick is nice if you don’t like them raw. If they smell, they are off, don’t touch them !
I sat next to a lovely young woman at the allergy clinic who had noticed that her throat became itchy after eating prawns. She had quite a few little pin pricks on her arm, prawns, crab lobster, oyster, etc. They were all becoming red and itchy, no more prawns for her, sadly she loved them!