Mushy peas are baby food. I do like peas though, especially with ham (which is like bacon...). But fish IS seafood...
I dislike peas in any form and obviously don't eat any form of pork, someone did say to me once that she understood I didn't eat pork but surely I ate bacon was fine.

'Seafood' in the UK is the stuff from the sea that isn't fish ie. crabs, lobster, prawns, cockles, scallops, mussels, winkles, squid, octopus etc.