When I was in middle school, about twelve years old (around 1989), I remember reading a fantasy novel recommended to me by our school librarian and have tried for years to remember its name.
The only detail of the story that has stuck with me is that at some point the protagonist breaks his arm and is found/helped/healed by sea otters. He lives among them for a time, learning to swim and hold his breath for extreme amounts of time. I think he may have also learned magic, and there may have been dragons involved.
Does anybody know what this book is called?