Sounds like a Brown Shark... Not sure where you are, but very common in my area.

Quote Originally Posted by The Voltron View Post
saw a shark wednesday mid afternoon while surfing solo. steady onshore breeze. saw it once for a second 100 ft away. saw it a second time much closer heading my direction cruising w fin up. needless to say i paddled in as quick and discreet as i could. can anyone id the shark? brownish, murky colored fin. had a bit of a spine with it. in comparison to the fin, i'd say the shark was atleast 4 ft maybe up to 6ft...