Front Page X-Ray Mag

Mackerel Meltdown: Overfishing Pushes Stocks to the Brink

Posted by Ila France Porcher

11 April, 2025 - 20:04

Ecology & Science
Mako Sharks Hit an Invisible Wall

Posted by Ila France Porcher

11 April, 2025 - 09:31

Ecology & Science
Shearwater issues important notice for all Tern and Tern TX users.

Posted by Chief minion

09 April, 2025 - 13:22

Equipment
Why some great hammerhead sharks prefer to stick close to home

Posted by Chief minion

03 April, 2025 - 13:01

Ecology & Science
Male Octopuses Use Deadly Neurotoxin to Safely Mate

Posted by Ila France Porcher

26 March, 2025 - 13:14

Ecology & Science
Updated US Travel Restrictions and Advisories: Implications for Dive Travellers

Posted by Chief minion

25 March, 2025 - 21:31

Travel & Trips

Latest edition

X-Ray Mag #132

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Resurfaced content

mackerel

Mackerel Meltdown: Overfishing Pushes Stocks to the Brink

Ecology & Science

A shortfin mako shark

Mako Sharks Hit an Invisible Wall

Ecology & Science

Shearwater Tern (left) and Tern TX

Shearwater issues important notice for all Tern and Tern TX users.

Equipment

This study examined the space and resource use of great hammerheads off Andros Island, The Bahamas. Adult great hammerheads of both sexes were documented year-round. The scientists found evidence of site fidelity, with some individuals re-sighted or recaptured in the same locations (< 1 km) up to four years apart.

Why some great hammerhead sharks prefer to stick close to home

Ecology & Science

Latest Press Releases

Upcoming Events & Expos

17 Jan, 2026 ➢ 25 Jan, 2026

Boot 2026

Düsseldorf, Germany

20 Feb, 2026 ➢ 22 Feb, 2026

EUDI

Bologna, Italy

Editorials & Op'eds

Try Something New & Different!

25 Mar, 2025 Chief minion

Our Way

03 Feb, 2025 Chief minion

Treading a Fine Balance

05 Jan, 2025 Chief minion

Wrecks & Marine Archaeology

All-Steel Freighter “Western Reserve” 1892 Wreck Found in Lake Superior

Mar 11, 2025 Steamships & Cargo

Oldest Carvel-Built Vessel in the Nordic Region Discovered in Sweden

Feb 24, 2025

Dutch WWII Submarine Located off Australia

Feb 23, 2025 Submarines

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Tech & Training

Simon Pridmore

Cave diver with rebreather

Rebreathers in Sport Diving: The Early Days

08 Apr, 2023

Mark Powell

Lessons from Technical Diving

13 Oct, 2011 Technical Diving

Matt Jevon

Teamwork

27 Feb, 2017 Matt Jevon Safety Culture

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Tech & Training

It’s Probably Not You – It’s the Cylinders

Jul 17, 2024 Training

Scuba diver

All the Trimmings: Tips to Improve Your Efficiency in Water with Good Trim

Oct 10, 2022 Training

NASA Johnson / Flickr / CC BY-NC 2.0

Do What You Teach and Teach What You Do

Sep 01, 2022 Training

Photo courtesy of Michael Mason

Be a Better Divemaster: Apply Human Factors

Jan 05, 2022 Training

Diver wearing a sidemounted rebreather

Bailout CCR Course Standards Outlined

Sep 28, 2021 Training , Sidemount , Rebreathers

Tulum, Mexico. Photo by Pierre Constant

Tulum: DPV Cave Diving Course in Mexico

Aug 01, 2021 Training

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Technical Diving - News

Tragic Incident off the Coast of Orkney: Lessons From a Diver's Fatal Accident

03 Jul, 2024

Technical Diving Features

US Coast Guard Report: Rob Stewart

29 Apr, 2024

Technical Diving - features from the archives

Pushing the Ressel—A Cave Diving Expedition in Lot, France

28 Oct, 2013 Cave Diving and Mines

Cave diver with rebreather

Rebreathers in Sport Diving: The Early Days

08 Apr, 2023 Technical Diving

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Safety Culture

Gareth Lock

Human Factors in Diving Conference Coming up

Jul 14, 2021 Safety Culture

Divers Adrift – Surviving Being Lost at Sea

Jan 09, 2021 Training , Rescue , Safety Culture

Gas Management 101

Jan 09, 2021 Training , Safety Culture

Avoiding Bad Gas – Tips for Preventing Breathing-Gas Contamination

Jan 05, 2021 Safety Culture

Defensive Diving, Part 2

Oct 31, 2020 Training , Safety Culture

Defensive Diving, Part 1

Jun 19, 2020 Training , Safety Culture

Travel

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Promotions and offers from our sponsors

Emperor Group Launches New Brand – Emperor Adventure

26 Mar, 2025

The 2025 Yap Day Festival Another Resounding Success

19 Mar, 2025

Explorer Ventures Liveaboard Diving Fleet

Explorer Ventures Announces Customer Appreciation Sale

13 Mar, 2025

MAIB Safety Bulletin: Safety Issues on Egyptian Liveaboard Dive Boats Operating in the Red Sea

06 Feb, 2025

Latest Travel Features

Indonesia’s Pulau Weh: Diving Sumatra’s Far Side

Pierre Constant

15 Feb, 2025

Travel & Trips

Southeast Asia

Indonesia
The Visayas: Islands That Never Disappoint

Lorenzo Moscia

29 Jan, 2025

Travel & Trips

Philippines
Bali’s Tulamben: A Macro Photographer’s Playground

Kate Jonker

18 Dec, 2024

Travel & Trips

Southeast Asia

Indonesia

Bali
Timor-Leste: Pristine Reefs, White Sandy Beaches & Ancient Caves

Pierre Constant

16 Nov, 2024

Travel & Trips

Southeast Asia

Timor-Leste
Indonesia: An Underwater Photographic Journey

Lureen Ferretti

17 Sep, 2024

Travel & Trips

Southeast Asia

Indonesia
Graciosa: Delectable Diving & Dining in the Azores

Brandi Mueller

27 Aug, 2024

Travel & Trips

Atlantic

Portugal

Azores

Dive Travel News

Airlines Start Dropping Pandemic-Specific Rules

03 Apr, 2021 Travel & Trips COVID-19

Emperor Seven Seas Liveaboard Destroyed by Fire

14 Mar, 2025 Travel & Trips

Travel News & Advisories

Updated US Travel Restrictions and Advisories: Implications for Dive Travellers

25 Mar, 2025 Travel & Trips

Is There Cause for Concern Over Liveaboard Safety?

14 Mar, 2025 Travel & Trips

Japan's Osezaki: Biodiversity Hot Spot of Tokyo

By Chief minion

10 November, 2021 - 21:02

Posted in: Travel & Trips
Murter Island, Croatia

By Andrey Bizyukin

02 March, 2013 - 20:22

Posted in: Travel & Trips
The Philippines' Puerto Galera

By Chief minion

23 March, 2018 - 13:38

Posted in: Travel & Trips
My Most Unusual & Unexpected Dive: Contributors Picks

By My Minion

21 April, 2021 - 11:11

Posted in: Travel & Trips
Himalayan Heaven

By Andrey Bizyukin

13 September, 2004 - 23:32

Posted in: Travel & Trips
Great White Shark Dive with Amos Nachoum

By Chief minion

13 October, 2011 - 23:25

Posted in: Travel & Trips

News from Divers Alert Network (DAN)

IANTD and SEI Adopt “Powered By DAN” First Aid Programs

Mar 27, 2025

DAN Launches The DANcast, a Podcast To Inspire Safer Diving

Jan 22, 2025

Connect With DAN at DEMA: Member Social, Appointments, Seminars, and More

Nov 12, 2024

DAN Launches “Every Diver” Campaign Featuring Member Testimonials

Oct 29, 2024

DAN Reminds Dive Pros to Avoid a Gap in Their Liability Coverage

Jun 19, 2024

DAN at 2024 Scuba Show

May 24, 2024

DAN Introduces Continuing Education for Dive Professionals

May 22, 2024

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Culture & Lifestyle

Portfolios

Paul Fearn Portfolio

By My Minion

27 April, 2023

Posted in: Portfolios
,
Posted in: Ocean Arts
Olivier Leger Portfolio

By My Minion

20 June, 2023

Posted in: Portfolios
,
Posted in: Ocean Arts
Tony Fredriksson Portfolio

By My Minion

06 February, 2023

Posted in: Portfolios
,
Posted in: Ocean Arts
Portfolio: Alan Williams

By My Minion

14 October, 2023

Posted in: Portfolios
,
Posted in: Ocean Arts
Marguerita Hagan Portfolio

By My Minion

10 October, 2023

Posted in: Portfolios
,
Posted in: Ocean Arts
Grace Marquez Portfolio

By My Minion

07 August, 2023

Posted in: Portfolios
,
Posted in: Ocean Arts
Nate Wilson Portfolio

By My Minion

19 January, 2023

Posted in: Portfolios
,
Posted in: Ocean Arts
Kate Jonker Portfolio

By Chief minion

01 September, 2022

Posted in: Portfolios
,
Posted in: Ocean Arts

Books & Media by our contributors

Lusitania: The Underwater Collection, by Vic Verlinden

Vic Verlinden

Technically Speaking – Talks on Technical Diving Volume 1: Genesis and Exodus

Simon Pridmore

My Sunset Rendezvous: Crisis in Tahiti

Ila France Porcher

Elysium Coral Triangle

Michael Aw

Books & Media by others

Sidemount Diving

Bob Neto

The Hunt for Lady Olive & The German Submarine

Encyclopedia of Whales, Dolphins and Porpoises

Erich Hoyt

Shipwrecks of the Dover Straits

Stefan Panis

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Ecology

Stuff

Mackerel Meltdown: Overfishing Pushes Stocks to the Brink

By Ila France Porcher

April 11, 2025 - 20:04

Posted in: Ecology & Science
Mako Sharks Hit an Invisible Wall

By Ila France Porcher

April 11, 2025 - 09:31

Posted in: Ecology & Science
Why some great hammerhead sharks prefer to stick close to home

By Chief minion

April 03, 2025 - 13:01

Posted in: Ecology & Science
Male Octopuses Use Deadly Neurotoxin to Safely Mate

By Ila France Porcher

March 26, 2025 - 13:14

Posted in: Ecology & Science
Octopus Is Spotted Riding a Shark

By Chief minion

March 25, 2025 - 15:59

Posted in: Ecology & Science
Penguin Guano Sends Krill Into High Alert

By Catherine GS Lim

March 24, 2025 - 15:09

Posted in: Ecology & Science

Marine Mammals

Narwhal's Tusk Not Just for Show

Mar 09, 2025 Whales

Elephant seal

Elephant Seals as “Smart Sensors” of Fish Populations

Feb 28, 2025 Seals & Sea lions

Pinnipeds: Is It a Seal or a Sea Lion? That Is the Question

Feb 24, 2025 Seals & Sea lions

Dolfinshow in Marineland

Marine Park Closes: The Troubling Legacy of Orcas in Captivity

Jan 15, 2025 Dolphins , Orca

Sharks and Rays (Elasmobranchs)

A mako shark

Mako Sharks Hit an Invisible Wall

Apr 11, 2025 Sharks

Octopus Is Spotted Riding a Shark

Mar 25, 2025 Sharks

Sharks Thrive Again in Belize Waters

Mar 20, 2025 Sharks

Megalodon resembled lemon shark

New Study: Megalodon Looked Like a Lemon

Mar 13, 2025 Sharks

Sentience and Self-Awareness

dolphins leaping

Dolphin Intelligence: Do They Talk?

Oct 24, 2024 Self-awareness

Understanding the Octopus: A Dive into Its World

Aug 23, 2024 Sentience , Octopus & Squid

Blue-ringed octopus

Sentience or Consciousness?

Aug 02, 2024 Sentience

Can Clownfish Count?

Feb 04, 2024 Sentience , Fish

social sharks

Sharks as Social and Sentient Beings

Aug 28, 2023 Sentience

Fish Recognises Itself in Photographs

Jun 30, 2023 Behaviour , Self-awareness

Giant Pacific Octopus - photo by Andrey Bizyukin

Do Octopuses Have an Emotional Life?

Jul 30, 2022 Sentience , Octopus & Squid

Their apparent problem-solving ability has led cephalopods to be recognised as intelligent.

Do Octopuses Dream?

Apr 01, 2021 Sentience , Octopus & Squid

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Photo & Video

Rico Besserdich - tutorials

Surgeonfish, Red Sea, photo by Rico Besserdich

A New Approach: Shooting Common Subjects in Different Ways

Sep 28, 2021

Underwater Photography on a $500 Budget

Jul 21, 2021

Prepping for Print

Apr 02, 2021

Sharpening Underwater Images in Postproduction

Nov 23, 2020

Photo by Rico Besserdich

Vivid Color with Lab in Postproduction of Underwater Images

Oct 31, 2020

Photo & Video

White as a Design Element in UW Images: Contributors’ Picks

Still photography

Romanticism & Romantic Elements in UW Images: Contributors’ Picks

Still photography

Gem Tones in UW Images: Contributors’ Picks

Still photography

Story Behind the Picture: Whale Whispers

Still photography

Ornate & Ornamental: Contributors’ Picks

Still photography

Sea&Sea LX Snoot

By My Minion

March 12, 2025 - 12:04

Posted in: Photo & Video
Bigblue TL4000P Canister Light for Technical Divers

By My Minion

March 12, 2025 - 11:42

Posted in: Photo & Video
52 Assignments: Underwater Photography by Alex Mustard

By My Minion

February 25, 2025 - 16:27

Posted in: Photo & Video
White as a Design Element in UW Images: Contributors’ Picks

By My Minion

February 15, 2025 - 10:43

Posted in: Photo & Video
Backscatter Xterminator

By Morten Bjørn

January 31, 2025 - 12:38

Posted in: Photo & Video
Romanticism & Romantic Elements in UW Images: Contributors’ Picks

By My Minion

January 14, 2025 - 18:36

Posted in: Photo & Video

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