Whales are much more interesting, and Orcas hunt and kill the biggest Sharks for fun

And other whales are far too big to be threatened by Sharks

Although as a career Sharks may be more of a market as their is some species of Sharks (such as the Greenland shark) that we still no very little about and research into them is ongoing

Whales.

sharks

though I have to admit orca are pretty awesome

you can't go wrong with megalodon, bull sharks and of course, the tasseled wobblegong shark

http://en.wikipedia.org/wiki/Tasselled_w...

need to know? wanna be a marine biologist