JoJo and his dad go down to the seaside to explore the rock pools. It’s a great day of discovery but nothing compared to what happens later. The gnome of his imagination turns JoJo into a fish to teach him a lesson or two. Then the fun really starts as he gets to meet all the creatures of the pool. Life in the pool is not just easy swimming and JoJo gets into several great adventures. He has to rescue a friend from the clutches of an octopus and save another friend from being eaten by the biggest fish in the pool. It’s a underwater world of thrills and spills and JoJo learns a great deal including some very important things from Lancelot the wise old lobster and oldest resident in the pool. JoJo becomes a confirmed friend of all the sea creatures and has a far greater understanding of the importance of the sea – a great adventure.