Little fishy indeed. Jack gets a large splash from behind, soaking him with salt water and leaving a trail of sea weed draped over his head. Under the boat, the male swims down in order to get some speed and goes straight for the bottom of Jack's boat with full intentions to tip him over and drown him. Only a foot or two from his target he's seized and yanked away.
The empty rum bottle keeps dancing in the waves for Jack, listing along with the current of his boat. But as he watches the bottle zig zags, too fast and erratic. It's pulled away, making it's own tiny waves as it changes direction to come right for him. Closer.. closer... gone.