Spearfishing the most physical hi calorie burning and dangerous sport there is with shallow water black out ever present only fast axe chopping is the only thing that burns more calories and yes years of pool work outs to get to your level enjoyed the video wish I had a broom tail grouper steak to throw on the BBQ
if you want to get into spearfishing I highly recommend you read Terry Maas blue water spearfishing book it might save your life
my diving career started at 14 popping abalone at Clemente island