Sailfish and sharks are not exactly friends - they try to stay as far as possible away from each other in normal circumstances. And even if a lot of food available, like sardine baitball - still there must be some kind of parity for these two species to appear together. Sailfish will never join big shark party - neither otherwise.

This shot was taken when during rare calm moment in the bait ball sail fish appeared followed by solitary shark - it did not last long, once more sharks arrived sailfish was gone - but it was enough time for me to take this rare picture ^_^