I must read that book and I must see that film too, it could be just coincidence but then again it might not be. I am going to assume there might be a message there and attempt to work out what it is. Of course the otter is one of the forms which Cerridwen takes. My guess is that the message, wherever it is from and maybe only internal, might be something regarding Cerridwen. My studies are currently involving this story, so that makes sense.