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. Many people do not know what they are eating!
'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.