Spearfishing in open blue water means playing in a system where you are never at the top of the food chain. New Zealand-based content creator Henry Gibbs learned that lesson the hard way during a dive off Fiji when a grey reef shark bypassed his speargun, clamped onto his calf, and initiated a death roll.
The footage, captured on a GoPro and later shared across social media, shows a sequence of warning signs that many open-water divers routinely dismiss. Gibbs survived with his leg intact, but the aftermath required four surgeries and a skin graft. If you spend time in the ocean, ignoring the behavioral cues of a reef shark is a mistake you only get to make once.
Reading the Red Flags in Open Water
Gibbs and his companions had spent a couple of hours diving along a familiar reef before pushing out into deeper blue water to chase larger fish. Several grey reef sharks were patrolling the area. One specific animal stayed longer than the others, shifting its swimming pattern into tight semicircles beneath the divers.
According to Gibbs, that erratic movement should have been the cue to call off the dive.
"I never thought a shark of that size posed much of a threat, and that was a mistake," Gibbs noted after the attack.
Most divers accustomed to temperate waters—where encounters with inquisitive sharks are often lower-stakes—make the critical error of projecting those docile behaviors onto tropical reef species. Grey reef sharks operate under strict territorial rules, especially when blood, bait, or spearfishing commotion enters the water. When an animal starts sprinting toward your boat or tightening its turning radius, it isn't curious. It's evaluating you.
The Reality of the Strike
When the shark made its move, Gibbs saw it coming. You can hear his voice spike on the camera recording right before the impact.
The shark slipped past his defensive speargun, dropped underneath his body, and anchored its jaws straight into the back of his lower right leg. The immediate danger in a shark bite of this nature isn't just the initial puncture; it's the rotational force of the death roll designed to shear tissue.
Quick thinking from fellow divers Dan and Colby saved the situation. They got Gibbs out of the water instantly and managed the heavy arterial bleeding before transport to a hospital via Port Denarau Marina. Without immediate trauma intervention, calf muscle injuries involving deep tissue tearing can easily turn fatal within minutes.
Hard Lessons for Spearfishermen
Gibbs bears no ill will toward the animal, describing the event as a textbook case of being in the wrong place at the wrong time while hunting a shark's natural prey. Yet, his experience highlights concrete safety adjustments every diver needs to adopt before stepping off a boat:
- Watch the geometry: If a reef shark tightens its circles or changes its swimming tempo from fluid to rigid, end the dive immediately. Do not wait to see what it does next.
- Reconsider your gear: Divers working in tropical waters should avoid highly patterned or camouflage wetsuits that contrast sharply against the pelagic background, opting instead for solid, plain designs.
- Carry proper medical kits: Having a trained companion who knows how to apply tourniquets and pressure dressings on a rocking boat is just as important as your speargun or fins.
The ocean doesn't negotiate. Respect the territory, heed the behavioral shifts of predators, and always prioritize a quick exit over landing one more fish.
