Pat, Thanks for the advice. Believe me it is taken to heart. My fish were on a metal Stringer which I had on a 6 foot length of rope to keep it away from me (Mainly because of Nipping Triggerfish) during spearing. I keep the stringer on a "D" Ring on my hip while fishing and move it to my chest "D" Ring on the way to the surface to make it easier to move to the boat crew once on the surface. This arrangement has helped me minimize entanglement with mono or shock cords when I dive as well. I had with both AJ's I shot on this day killed the fish with my knife at the bottom to eliminate as much "Vibration" as possible and prevent more blood from pumping out, but it appeared it me that the Shark had made up his mind that he was going to take this meal, no ifs/ands/or buts!
In regards to aggressive posturing toward a Shark, I appreciate your stand but swimming at a charging Bull Shark in my eyes is like running at an attacking Lion, in theory the Shark will turn but after 4 aggressive advances by the shark I felt it was time to give up the fish. The key factor in the whole event that no one has discussed is how a Shark can "Smell" in-trepidation and fear, and I won't lie that my heart was in overdrive and my Butt Cheeks were puckered into a cramp, I did my best to remain calm and never saw my life flash before my eyes or anything, but I did think to myself that I wasn't really hungry for Amberjack and no lie I was huffin' down the air!
Pat, If you had or have been in that same boat and won the day with fish in hand then my hat goes off to you! Me, I'll rethink how I spear and will not be left in this situation again without a better understanding of a game plan. Had I not had to free ascend from depth due to an idiot in my group and not knowing how long of a surface swim I had with fish in hand I may have tried to hold onto my fish a bit longer but with the thought of a surface swim ahead and a bull below, it seemed a task I did not want to endure! No disrespect intended, but in the same situation, the fish are gone again!