If you want seafood in Sweden the westcoast is where to go. Being from Galicia (where they eat everything from the sea) Mercedes is not very impressed by what Sweden has to offer. Crabs are plentiful though when you dive but if you want to eat lobster you need to buy frozen in the foodshops. Bringing lobster when diving is strictly forbidden and fishing them is only allowed in the autumn.
What we do miss is the clamshells found in Norway.