From masses of seaweed to pretty star fishes and elaborate reef gardens, there’s plenty to colour in inside Lost Ocean. Some of the images may take a while to colour in, but considering how lovely and detailed the reefs are I think it’s definitely worth the time. The patterns are pretty and delicate. Basford includes treasure hunting in her underwater world. Dispersed throughout the pages are items such as pearls and trinkets. Colouring books are definitely relaxing and enjoyable; no wonder we enjoyed them as children!