The Ocean Cake

Hi! I made this cake for my little brother and it is ocean themed. There is an island in the middle, an ocean with ripples,fish and crystals round the side and I piped some "Seaweed" onto the shore. The cake inside is chocolate and I made all the decos with royal icing, apart from the stuff I piped. The palm tree was hardest to make, because the leaves wouldn't harden, so I propped them up with some "coconuts".  Hope you like it!!!  (If enough people say, I will add instructions)