I have a client who wants a cake similar to this one found right here on Cake Central:  http://www.cakecentral.com/gallery/i/2109441/shark-birthday-cake

The cake will be covered with buttercream not fondant.  

My initial thought is to make a football cake and butt it up against a stacked round.  Then place dowels horizontally between the two cakes to stabilize.

My other thought was to make a stacked round and carve out the mouth.

I would appreciate any thoughts or advice.