Nelson and Kenny want only one thing: tickets to the new show at the Big Aquarium. Most interesting to them: seeing the giant squid up close. It's not that simple because the tickets are expensive, and Nelson and Kenny have to find a solution to the matter. They definitely try and participate in a prize-winning swimming competition. The problem is that no one told them that to win the competition you also need to know how to swim... In the end, when they get to the aquarium and meet the giant squid, they discover something amazing. How lucky that a ninja child and a gym are always there to sort things out! Ninja child, the hit series written by Anne Doe, has been a huge global success. Ninja child - the ninja fish! is the ninth book in the series.