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Dive into Taiwan: Kenting

In the southernmost district of Taiwan lies the Taiwanese Riviera, located in Hengchun Township (also known as Kenting), where divers enjoy the warm waters and plentiful marine life of the sheltered bay of Nan Wan, with its coral cliffs, reefs and pinnacles. Simon Pridmore has the story.

Whales have developed mechanisms against diseases such as cancer.
Whales have developed mechanisms against diseases such as cancer.

Why whales don't get cancer

Cancer should be a near certainty for whales, being the longest-living and largest mammals there are. Across species, the higher the number of cells, the greater the number of cell divisions and the higher the probability of DNA damage and the transformation of a normal cell into a cancerous one.

However, the occurrence of cancer does not show a correlation with body mass. The lack of correlation between body mass and cancer risk is known as Peto’s paradox.

Explore the Underwater Jungle! LIDA Film Festival

There’s a jungle off the California coast. It is lush, and green, and filled with a marvelous diversity of life. It is every bit a wilderness, with a complex eco-system that is both resilient and fragile. And if you were to look at the islands poking their heads above the water about an hour outside of Ventura, you’d be surprised to be using those words. The islands look barren and dry. Hardly the place for thick jungles of plants and trees.

Nurse shark
Nurse shark

Some sharks return to the same sites to breed for decades

Scientists with the New England Aquarium found that nurse sharks, Ginglymostoma cirratum, returned to the waters off the Dry Tortugas, 70 miles (113km) from Key West, to mate for up to 28 years. The Dry Tortugas has been known as a courtship and mating site for nurse sharks since 1895.

A 30-year (1992–2021) study documented long-term site fidelity to this area, with data from 137 adult sharks.

Competence & Confidence

Diving is a relatively safe activity and pastime. At least, it ranks low in statistics regarding injuries compared to many other sport disciplines. Certainly, we would not have dive programmes and certifications for young kids under eight years old if it was unsafe or risky.

But low risk is not equal to no risk, and whatever is considered an acceptable level of risk under various circumstances can always be lowered further—perhaps just in small increments, but it all adds up over time.

Nate Wilson Portfolio

Banggai Cardinalfish Shoal, 36in x 24in, watercolor by Nate Wilson
Banggai Cardinalfish Shoal, 36in x 24in, watercolor on paper by Nate Wilson

American artist Nate Wilson creates beautiful and enchanting watercolor paintings of marine life with great attention to the unique characteristics of each species. X-Ray Mag interviewed the artist to find out more about his artwork and creative perspectives.

Ear Problems in Diving – Part 3: The Inner Ear

Diagram of the ear
Figure 1. Diagram of the ear, showing the anatomy of the inner ear. (Image source: Wikimedia / CC BY 2.5. Labels: Dr Michael Rothschild)

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.

Showing Scale: Contributors' Picks

Three large, female tiger sharks approaching the feeder, Tiger Beach, Bahamas
Photo by Matthew Meier: Three large, female tiger sharks approaching the feeder, Tiger Beach, Bahamas. Gear: Nikon D810 camera, Sigma 15mm fisheye lens, Subal housing, two Sea&Sea YS-250 strobes. Exposure: ISO 200, f/8, 1/100s

In underwater photography, "scale" can mean a couple of things: how big or small a thing is or the myriad of tiny plates on the skin of a fish. We asked our contributors what their favorite underwater photos were that showed scale. And playing on the pun, they came back with a creative mix of macro, wide-angle and close-up abstract images.

The Sap-sucking Sea Slug: Butterfly Sacoglossan

Cyerce sp. sacoglossan sea slug, or butterfly sap-sucking slug, Green Island, Taitung, Taiwan.
Cyerce sp. sacoglossan sea slug, or butterfly sap-sucking slug, Green Island, Taitung, Taiwan.

Many divers, and especially macro underwater photographers, adore the lovely, colorful, and photogenic sea slugs found in the deep. We often call them nudibranchs, the “butterflies of the sea.” But not all sea slugs are nudibranchs. Have you ever heard of the sacoglossan? Underwater photographer Wesley Oosthuizen takes a closer look at a special sacoglossan species—the butterfly sap-sucking slug.