With as many sharks as there are, I think it would be a neat mechanic to have a bucket'o'fish guts to throw in the water to attract the sharks.
Say your crew is overboard getting loot, or investigating a wreck, and suddenly Jaws shows up with his buddies. Grab your chum bucket and toss it over the opposite side of the ship as bait and holler for your mateys to hurry up and get back on deck!
Might also be useful to deter boarding attempts via swimming!
What say ye salty dogs?!
