The mammalian dive reflex is the autonomic adaptation that lets humans dive deep on a single breath. How it works, how to train it, and why it matters for spearfishing safety and performance.

Why Iki-jime is so much better for your fish than just standard bleeding?

A complete guide to spearfishing Guam, Saipan, Tinian, and Rota — the CHamoru tokcha tradition, target species, regulations, conditions, and how to plan a Western Pacific trip on US soil.

Divers' spear gun floating by itself after diver blocks out.

A practical guide to spearfishing depth: typical hunting ranges by experience level, what actually limits your depth, equalization techniques, safety protocols, and how to build up safely without blowing an ear or lung.

The breathing sequence you do before a freedive determines how safe and productive it is. Learn the proper breathe-up protocol, why hyperventilation is dangerous, and how to dial in surface intervals, heart rate, and mental cues for every dive.

Spearfishing the Gulf Coast: red snapper, amberjack, cobia, and rig diving across Texas, Louisiana, and Florida. Seasons, regulations, and tactics explained.

Between 2019 and 2025, CDFW logbooks recorded 185,319 bluefin tuna catches off Southern California. Here's what that data actually reveals about when, where, and how to hunt them.

California bluefin tuna catches grew 25x in five years. Here's the data behind the boom, when it peaks, and what it means for bluewater divers.

Wahoo are the fastest fish in the ocean and one of the ultimate bluewater targets. Learn the gear setups, flasher rigs, shot placement, and timing that put more wahoo in the boat.

Bluefin tuna spearfishing tactics: boat positioning, finding fish, water temperature, approach, and shot placement to land California's biggest pelagic.

Bluefin tuna spearfishing gear: spearguns, slip-tip shafts, bungee floatlines, multi-float rigs, and bluewater wetsuits built to land 100-300 lb tuna.