When guests arrived, they decorated some cardstock sea creatures and taped them to a posterboard "ocean." I also had a fishing puzzle out, and some ocean books. Intended to have the fishing game as well, but realized it was at the cabin. Oh well - that one always ends badly at our house anyway.
The kids "fished" for the prizes in their goodie bags.
Snacks were Goldfish crackers and Swedish fish.
Then we opened presents and had cake. A fishie cake of course!
I also made little fish sugar cookies for the gift bags - I thought the little "3s" on the side looked kind of like fins!