Shark Week - Tiger Shark

Hurrah, Shark Week has finally begun!

So, here's the Garbage Can of the Sea, a.k.a. the Tiger Shark. They'll eat anything, & are famed for both their appetite & their aggression.

Can you tell I'm getting a bit better with the whole painterly style? I didn't even use lines this time, just blocked the shark in & started defining it. I'm also trying to get a good, "proper" composition in all my Shark Week submissions, so this one follows the rule of thirds, naturally. It's also supposed to transition from high- to low-contrast, & light to dark colors.

Credits:

Rock brushes.
Tutorial on background lighting effects; used for waves.

Which shark shall I draw next, people? Tell me in the comments!