My first trip out to Neptune Islands to cage dive with the Great Whites was in August 2008 but unfortunately we went 5 days without sighting any GWS. One morning we came out on deck to find one of the tuna baits gone ... which started to excite us with the possibility of a shark in the area. We'll the excitement eventually waned as we sat through the morning without a sighting. Come afternoon, it was decided that we would submerse the bottom cage and scour the bottom for sharks. A medium size tuna was thrown into the cage to lure anything we could find.
As we descended, it was decided to leave the cage gate open to photograph the large rays that skimmed across the sand ... but someone forgot to tie the tuna to the cage and it slipped out. 15 - 20 minutes later, all we had sighted was rays and schools of small jacks/trevally - no sharks. Long story short, Tim decided he wasn't going to leave a perfectly good tuna on the bottom so he slipped out of the cage to salvage the tune ... and then ... out of no where ... pounces a seven gill shark (a rare sighting for the Neptunes), latches onto the tuna and was not letting go.
It was a tug-of-war ... man against shark for a chunk of tuna. The result was a draw. By the time the shark had had enough he had already scoffed half the tuna .. and Tim returned to the cage with the other half. I guess you call that an even money bet. This is one of the images I snapped of that tussle between man and shark.