I’ve heard that divers have observed from below many a surfer being trailed by a large shark, unknowns to the surfer. Here’s one sharked jew from the pipeline anchored a few years ago. I’m no expert but the teeth gaps visible in shoulder where about 1 inch, suggesting a pretty big nasty….10 minutes later a surfer paddled across the back of me. Having said all that, I think the abundance of normal “feed” keeps the nasty’s happy.