Chloe and her little brother Jackson are going to the Great Barrier Reef in Australia. Chloe can't wait to go exploring. Jackson can't wait either. He wants to wear his superhero cape and find a crownfish. Chloe thinks that Jackson is too young to be a hero. He doesn't even know that he is saying clownfish wrong. But there are a few surprises in this story for Chloe. Will she learn that heroes can be any age?