Complete guide to choosing your dive computer: types, algorithms, real functions and common mistakes. No brands, no advertising by an SSI Full Cave Diver instructor.

Complete technical guide to photographing marine wildlife: sharks, mantas, bait balls, macro and megafauna. Real technique from a professional underwater photographer.

What happens every winter in the fjords of northern Norway: orcas hunting in family groups, humpback whales, herring and the northern lights. The most extreme natural spectacle in Europe.

Complete guide to choosing your diving wetsuit: types, thickness, materials, fit and common mistakes. Everything nobody tells you before buying, by an SSI instructor.

The octopus doesn't have one brain — it has nine. It edits its own RNA, dreams in colour and each arm thinks independently. What real science says about the strangest animal in the ocean.

Complete guide to diving the Northern Red Sea: SS Thistlegorm, Carnatic, Tiran reefs and Ras Mohammed. Liveaboard, nitrox included and the world's best wrecks.

Guide to diving in the Azores: blue shark, mako shark, sperm whales, mobula rays, and dolphins in the North Atlantic. Princess Alice Bank, Gordon's Bank, and how to experience it.

Divevolk or dedicated underwater camera? An objective comparison with no brand sponsorship: advantages, disadvantages, price, quality and which diver profile each suits.