I would have sent this mate back for the head cos I quite like the way that a dolphins skull doesn't look anything like you would imagine and wouldn't mind a good look at one.
I remember borrowing a book on bones out of the library ages ago and being fascinated by the skeletons of moles, bats and dolphins in particular.
I just liked working out how evolution has altered the lengths of the bones and given them a change of use, the fingers of the mole, being the wings of the bat and the flippers of the dolphin.