According to the director, the shark they were using in that scene was supposed to be dead, so when his crew asked if they could take its teeth and use them to make necklaces or whatever, he said "sure." It was only once the shark started moving in the water tank and went for the stuntwoman's leg that they realized it had been alive all along (unless it was a zombie shark or some sort of shark Jesus). You can see that moment at 5:34 below; if you detect any yellow liquid around the stuntwoman's bathing suit area, that would be totally understandable.Â
After spending the whole movie defending sharks, the protagonist misplaces his protective medallion for like one minute and is instantly eaten alive by his friends, so apparently their "emotional connection" wasn't that strong. That, or the scene called for them to kiss the shark killer-killer all over his body to show their appreciation, but the fish actors got a little carried away.Â