Which is more intelligent: sharks or dolphins? Why?

DOLPHINS are smarter. Why? DOLPHINS regonize themselves in the mirrors and showed interest. That makes them playful. Behavior for mirrors on intelligence is actually: DOLPHINS even show More interest than humans

Dolphins actually sharks are afraid of a disease all Dolphins have its hard for a human to catch but easy for a shark to catch that's what my aunt told me XDD

This link can help you :)
http://www.answers.com/mobile/Q/Why_are_dolphins_smarter_than_sharks