In case you are wondering what happened to my reptilious shark , it was left ufinished of course. But it turned out well. The reason I did not finished is because i tried to sculpt scales on its body resembling a crocodile but it was a bit difficult. It required a high detail mesh and my computer did not allow it (only 2 GHz at the time and a low spec graphic card) and that was my excuse for quiting.
But I managed to sculpt properly the model , so I share it with you now , some people may find it worth their time.
This is the model , sculpted in Zbrush and rendered in XSI
and this is the wireframe
Click the photos for a larger view.