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It is mentioned in this follow-up article, which also provides ample opportunities to learn lessons about this incident.
Diver pulled down by giant tuna in stable condition | The Manila Bulletin Newspaper Online
I didn't see anything about spear fishing. "Back in the day" our dive master used to feed the huge grouper on Santa Rosa Wall in Cozumel. He was waving a piece of bait to a particular grouper when a really big one came from behind. He just happened to be "descending" slightly and his gauge console was floating up. The grouper snagged his console along with the bait and zoomed down the wall with him. Accidents do happen, strange but true.
Another good reason for clipping you gauge off to a D ring?
It is mentioned in this follow-up article, which also provides ample opportunities to learn lessons about this incident.
Diver pulled down by giant tuna in stable condition | The Manila Bulletin Newspaper Online