Well guys why don't we take all the variables out of spearfishing. Lets have 3 metre guns so we can shoot fish from the surface then all the old fat guys can get fish as well, also we can breath up on oxygen before each dive then we will have 3min bottom time, in fact why dont we just power-head all the sharks from our local area then we can just spear to our hearts content without having to give the noahs a thought at all.
U/w photography fair enough but when you are out there as a predator give the fish and the oceans a chance. I have jumped out of the water many times because the sharks were getting a bit angry and most times there have been fish everywhere ( hence the sharks). If I had a shield a would have just flicked the switch and kept spearing.
Shark dramas are part of the beauty and thrill of the sport. You clowns who need a shield to get in the water just want the easy side of spearing without any of the risks.