A brand new title in our successful Shine A Light series, focussing on the animals of the ocean. Uncover the facts beneath the waves through hidden images that are revealed by light. First, view a full-colour scene and read about what is pictured – but what else is there? Shine a torch behind the page to reveal what is hidden.

Pwy sy'n byw o dan y tonnau? Goleua'r dudalen a chei weld ... Edrycha'n fanwl ar gefnforoedd y Ddaear a chei weld byd y dŵr sy'n llawn rhyfeddodau mawr a man! Cei ryfeddu at y cynefinoedd tanddwr, y bywyd gwyllt a'r nodweddion anhygoel, o forloi bach yn yr Arctig i ddreigiau môr deiliog sy'n cuddio yn y Cefnfor Tawel.