Bahamas Spear-fishing is a tremendous sport which keeps you very fit.
It is not easy to free-dive down to a fish, spear it and bring it up again in one breath.
You will find that your lungs need to expand and that you start performing on your 3rd day of fishing.
Allways stay close to your buddy because sharks are like silent shadows in the water. It is amazing how they pop-up just when you dont need them, i.e. whilst you have a fish on the spear.
It is posible to spear a shark under water but be very carefull because you have to brain them otherwise you are in for trouble. A bang-stick is a good alternative.