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Featured

Mating Sharks and Tonic Immobility

Shark Tales, in X-Ray Mag's issue #63, focused on pain in fish and sharks, and included a short piece on mating behaviour. The violence of the encounter is typical of mating sharks, thus raising the question of the suffering of the female shark during mating.

mating wounds
Ecology & Science

So I asked leading shark ethologist and behaviourist, Professor Samuel 'doc' Gruber to elaborate. After pointing out how much pain women feel when they give birth, making the point that suffering has no effect on reproduction, he reminded me that sharks evolved their mating behaviours and the physical structures involved, separately from other animals.

Do sperm whales have a culture?

Differences in patterned clicks of sperm whale communication may lean towards culture rather than genetics. Findings could influence conservation efforts; instead of solely focusing on the animals’ habitat, protection should also consider which dialect they use.

Photo & Video

Researchers have discovered that differences in the patterned clicks of sperm whale communication may lean towards culture rather than genetics. A study published in Behaviour Genetics suggests that sperm whale groups are made up of individuals that use the same dialect, rather than those that come from a similar area of the Pacific.

Our Own Backyard

The editorial introduces X-Ray Mag’s Sweden-themed issue, highlighting Scandinavian diving, Baltic wrecks and the region’s distinctive underwater heritage.

Op'eds and commentaries

The theme of this issue is something that we have wanted to do for a very long time.

While the team behind X-RAY MAG is truly international, spanning several continents from Catherine GS Lim in the East, who faithfully and solidly takes care of our business out of Singapore, to Barb Roy in Canada, the tech-diving grandma of British Columbia, and all our other wonderful editors in the times zones in between, our founding editor-in-chief, Peter Symes, is a native Copenhagener of British-Scandinavian heritage.

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Reviews

Books & Media

Reefs of Time

In Reefs of Time, geoscientist and science educator Lisa S. Gardiner offers a compelling and accessible exploration of how fossil coral reefs can inform our understanding of the threats facing reefs today. 

Book cover:  Reefs of Time
Review
Books & Media

Marine Life of the North Sea and English Channel

Lawson Wood’s Marine Life of the North Sea and English Channel is an extensive guide dedicated to the exploration and understanding of the diverse marine ecosystems found between the British Isles and the coasts of northern France, Belgium, the Netherlands, Denmark, Norway and southern Sweden.

Cover  Marine LIfe of the North Sea and English Channel
Works by Our Contributors
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Lawson Wood
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Technically Speaking

Simon Pridmore's aim in writing this book was to examine and record where technical diving came from, how it developed, how it expanded across the world, who the important movers were and how the efforts of a few determined people changed our little field of human endeavour forever.

Technically Speaking
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Simon Pridmore
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Secret Seas

Professional underwater photographer, Paul Flandinette and marine scientist and underwater photographer Michel Claereboudt take the reader on a breathtaking journey of discovery into Oman's underwater world.

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Compiled by an international network of top dive editors and world-class underwater photographers, X-RAY MAG is the planet's only truly global premier dive lifestyle magazine. Subscription and downloads are free. Published since 2003.

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