The thermocline is where warm surface water meets cold deeper water - and where many predator species stage to feed. How to find it, what fish hold there, and how to hunt them.

Red tide kills viz, can make you sick, and changes where fish hold. How to spot it, when it's safe to dive, and what to do if you encounter a bloom mid-trip.

Negative pressure dives let you train deep-water adaptation in a swimming pool. How they work, when to use them, and how to add them to your training without the depth risk.

Hyperventilating before a freedive feels like it helps. It actually masks the urge to breathe and dramatically increases blackout risk. Here's the science and the safer alternative.

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?

Trachea squeeze is the freediving injury most often mistaken for lung squeeze. Different bleeding pattern, different cause, different recovery. Here's how to spot it and prevent it.

Lung squeeze is the most-feared injury in deep freediving. Learn the warning signs, what causes it, how to recover, and how to train so it never happens to you.

Building your Spearfishing gear over time. A 12-month gear roadmap

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.

Don't be that guy. Don't post pictures that expose spots.

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.

Speargun bands are the engine of your gun. Every bit of power you put into a shaft comes from how well your bands store and release energy. And yet, bands are also the most commonly neglected component on any setup. Divers will spend $800 on a gun, $200 on a slip tip and shaft, and then run the same pair of tired bands for three seasons until they snap on a shot at a personal-best fish. This guide covers how to know when to replace bands, what to buy, how to install them corr

Understanding the different types and of roller spearguns

Most divers blow shots by moving too fast. The craft of hunting fish is built on slow approach, patient waiting, and a smooth trigger. Here is how to stalk calico, sheephead, white sea bass, halibut, and yellowtail in California waters.

Master the hip-driven freediving kick. Learn proper biomechanics, common mistakes, ankle flexibility, and depth-specific technique to conserve oxygen, hunt silently, and dive deeper with less effort.

Why freediving snorkels ditch purge valves, splash guards, and dry tops in favor of a simple, flexible J-tube. A California diver's guide to picking the right snorkel, using it correctly, and knowing when to skip it.

A complete guide to spearfishing fish cleaning: field care, bleeding and icing, choosing a fillet knife, step-by-step fillet technique, species-specific tips, parasites, storage, and quick-cook ideas.

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.