Many people suffer from ear problems during and after diving. Technical rebreather diver and underwater photographer Dr Michael Rothschild is an ear, nose and throat specialist in New York City. In this series, he walks us through some of the common causes of dive-related ear problems, and how to treat and prevent them.

The Penghu Islands, an archipelago of 90 islands and small rocks in the middle of the Taiwan Strait, is a location of incredible landscapes with unique basalt columns and is home to some of Taiwan’s most beautiful beaches and marine protected areas, which offer some of the best diving in Taiwan. Simon Pridmore has the story.

In his Scuba book series, Simon Pridmore often tells tales of diving close calls or near misses. He tries to identify the key factors and suggest what the divers might have done differently to pre-empt or better deal with what happened. All the stories are true. Some he witnessed, some were recounted by friends, and others just crossed his radar screen at some point to be filed away for future sharing. This is one of the latter.

Many marine creatures have defensive mechanisms—they may sting, have venom, sharp spines, warning colors, or bite. We asked our contributors what their favorite underwater photos of these bold and beautiful critters were, and they came back with a variety of subjects like colorful nudibranchs, cnidarians that sting, scorpionfish with sharp spines, sharks and even crocodiles with sharp teeth.