This mod really shows the dedication (and sometimes oddity) of the Arma modding community. Does this military shooter really need hyper-realistic sharks based on extensive research by the Australian Institute of Marine Science? I can't say that it particularly does, but we got it anyway.
The mod adds in male and female sharks that swim around, hunt, bleed, behave differently in night and day, and only become aggressive if there aren't any other large fish food sources around. If you want to take time off from war to study marine biology, then have it my friend!