Adobe Photoshop is the number one tool for image editing and provides a large number of editing tools and options—far too many of them actually. But the good news here is that, for editing our underwater images, we only need a few.

I started cave diving in Italy in 1990. At that time, the rules were very clear, codified and related to the kind of caves that were encountered in my region. Very often, they were resurgences with current (sometimes strong) or sumps inside caves, with water ranging from crystal clear to the color of coffee and variable visibility, depending on the rains.

In Part I of this two-part series (see issue 100), I made a correlation between scuba diving and driving a car, particularly in the context of learning how to anticipate and assess dangerous situations, make well-informed sensible decisions and stay safe—things that motorists tend to group together under the catch-all phrase of defensive driving.

Japan’s diving scene used to be a well-kept secret, but more and more people have realised that Japan has much more to offer than just sushi and karaoke. The country spans a vast latitudinal range, from the tropical south where coral reefs dominate around Okinawa and the other Ryukyu Islands, into the almost subarctic north. As a result, its biological diversity is great, with many different habitats accommodating a wide array of species.