The family were sitting around the table eating dinner while the kids was getting a story read to him about the present he just received. Nothing Christmasy about that at all.
The ad illustrates the Christmas spirit and fish is a Christian religious symbol and actually traditional at Christmas in some countries and areas. I don't know if they did it on purpose in this ad or just because it would obviously not have worked for the wolf to bring a meat dish.
I was confused because one of the characters tells the wolf he might have more friends if he didn't go around killing animals all the time. Then the wolf starts making vegetarian dishes, and I thought, okay, they're promoting vegetarianism. Great.
But then later the wolf is killing fish, and that's ...okay I guess because they don't talk or walk like the other animals? The speciesism hit hard.