Rare Juvenile Oarfish Captured on Camera

Rare juvenile oarfish captured on camera for first time ever on Great Barrier Reef

Wavelength Reef Cruises Master Reef Guide Tahn Miller knew he had come across something extraordinary when he saw a glistening silver ‘sword-like’ fish dancing through the shallows of Opal Reef on the Great Barrier Reef earlier this month. The individual was a juvenile oarfish (Regalecus russellii) and Mr Miller’s video footage is the first recorded encounter of this species on the Great Barrier Reef and the eastern seaboard of Australia. 

Mr Miller and his colleague, Marine Biologist Jorja Gilmore, spotted the 35 to 40 centimetres long, skinny fish with a shimmering mirror-like outer skin while leading a group of snorkellers on a Wavelength Reef Cruises Outer Great Barrier Reef tour. The unique physical characteristics of the species made them realise they had found something very special.

“At first I couldn’t quite place what species of fish it was, but then I saw the shiny mercury-coloured body, two predominant eyes and the ultra-fine dorsal fin running head to tail, undulating like mini waves propelling through the water. I knew we had come across something rarely seen on the Great Barrier Reef,” said Mr Miller.

“Luckily, I had my camera and started to film straight away.

“At that moment I felt like the ocean had delivered a secret treasure to us. It was truly a once-in-a-lifetime encounter.”

Rare Juvenile Oarfish Captured on Camera
Rare Juvenile Oarfish Captured on Camera 4

Mr Miller said it was an exciting moment, not just for the Wavelength Reef Cruises crew, but also for the guests snorkelling the Reef that day.

“The sighting definitely enriched our guests’ snorkelling experience – not only the initial encounter below the surface but also the identification process that unfolded throughout the day,” Mr Miller said.

“The oarfish wasn’t in any of the Reef guidebooks onboard, so we tapped into the Master Reef Guide network and experts from the Great Barrier Reef Marine Park Authority to help identify the species.”

Oarfish are believed to be the world’s longest bony fish and can grow to an incredible eight metres in length.

“This little oarfish was about 35 to 40 centimetres long or about one to two metres including the fins, which is what led us to conclude it was a juvenile,” Mr Miller said.

“It had a mirror finish, like perfectly polished silver, and was as straight as an arrow, almost having the initial appearance of a newly forged sword.”

Rare Juvenile Oarfish Captured on Camera
Rare Juvenile Oarfish Captured on Camera 5

Since the sighting, Mr Miller has investigated other recorded encounters with a juvenile oarfish in the wild, including reaching out to deep-sea experts such as Dr Tyson R Roberts, the world's leading oarfish expert, for many years a Research Associate of the Smithsonian Tropical Research Institute in Panama.

Dr Roberts confirmed that the individual filmed by Mr Miller was the species Regalecus russelli, which features a single dorsal fin crest with five to six extremely elongated rays.

“This is the first record of this species on the Great Barrier Reef and on the eastern seaboard of Australia,” said Dr Roberts.

“There have been other oarfish recorded in southeastern Australia, but they are the Regalecus glesne species, which lives in cold water and has two dorsal fin crests above the head, differing from the individual spotted at Opal Reef.

“The only other Australian record of Regalecus russelli was at Port Hedland in Western Australia.”

Rare Juvenile Oarfish Captured on Camera
Rare Juvenile Oarfish Captured on Camera 6

Anyone who comes across what they believe could be an oarfish on the Great Barrier Reef is encouraged to log the sighting with the Eye on the Reef App.

Mr Miller said while an encounter with an oarfish on the Great Barrier Reef is highly unusual, with over 1,600 species of fish found on the Reef, visitors can experience a diverse selection of exceptional marine life and underwater structures.

“The Reef has an amazing power to connect human beings with nature. When you see it firsthand it entices you in, you fall in love with this environment and are inspired to protect it,” Mr Miller said.

“Put simply, visiting the Great Barrier Reef is a must!”

Opal Reef is located on the Outer Great Barrier Reef between Port Douglas and Cape Tribulation in Queensland. Wavelength Reef Cruises was the first tour operator to visit this Reef in 1986. It has been offering world-class snorkel experiences at this site ever since.

The Great Barrier Reef is one of the most sought-after destinations for a once-in-a-lifetime Great Barrier Reef experience. Ocean-lovers can find out more about this World Heritage wonderland at queensland.com/greatbarrierreef.

Photo credit @tahnmiller

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Is This The Best Dive Center Ever? W\@wakatobidiveresort

@sennacher 
#askmark Hi there, regarding DSMBs. I’m no expert whatsoever and normally I deploy it correctly. This weekend we dove on very strong current and I almost lose my breath while deploying it (mouth inflate) as it tangled a bit on my reg. It scared the sh&t out of me so. Is there any “little cylinder” kind of thing in order to keep my reg in my mouth to deploy it safer?  I haven’t tried to do it with my LPI… but asume it would tangle also.
Thanks
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#askmark Hi there, regarding DSMBs. I’m no expert whatsoever and normally I deploy it correctly. This weekend we dove on very strong current and I almost lose my breath while deploying it (mouth inflate) as it tangled a bit on my reg. It scared the sh&t out of me so. Is there any “little cylinder” kind of thing in order to keep my reg in my mouth to deploy it safer? I haven’t tried to do it with my LPI… but asume it would tangle also.
Thanks
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How Twinset Valves Work In Scuba Diving | Shutdown Drills And Isolator Tips Explained #scubadiving #askmark #twinset

Confused about how to use twinset valves or perform a proper valve shutdown drill? You’re not alone.

In this AskMark episode, Mark explains how valves work on twin cylinders, including how to safely open and close them, how isolator valves function, and why valve drills (also known as shutdown drills or V-Drills) are critical for diagnosing leaks during technical and recreational dives. Please visit our website for more Scuba news, underwater photography, hints & advice, and travel reports: https://divernet.com/ 

Mark also shares tips on muscle memory for reaching your left and right posts, isolator-first vs isolator-last logic, and how to prevent over-tightening or unsafe valve positioning. This guide is perfect for divers transitioning to twinsets, sidemount divers curious about manifold setups, or anyone wanting to improve their gas management skills. 

Let us know in the comments how your instructor taught valve drills and don’t forget to leave your questions using #AskMark to get featured in a future video. 

@mostafametwally1

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Disclaimer: The information in this video is not intended nor implied to be a substitute for professional SCUBA Training. This video's content, including text, graphics, images, and information, is for general information purposes only and does not replace training from a qualified Dive Instructor.

🔎 Related Phrases:

How Twinset Valves Work In Scuba Diving, Shutdown Drills And Isolator Tips Explained, How Twinset Valves Work In Diving, Scuba Valve Drill Tutorial, Shutdown Drill For Twin Cylinders, How To Use Twinset Isolator Valve, Twinset Manifold Explained, Best Way To Close Dive Valves, V-Drill For Scuba Divers, Twin Cylinder Gas Management Tips, Scuba Regulator Shutdown Steps, How To Practice Twinset Valve Drills, Muscle Memory For Valve Shutdowns

#scubadiving #askmark #twinset #scubavalves #shutdownskills #divingsafety #scubatraining #scubatech #divetips #manifoldvalve #valvedrill #scubagear #divingtechniques #scubacommunity #technicaldiving

How Do Valves Work on Twin Cylinders? #askmark
@mostafametwally1
#askmark hi Mark. Could you do a video on how to deal with the valves and manifold on twin cylinders. It’s confusing to remember which way to open the valves and it’s easy to get wrong particularly in emergencies. Thanks
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The information in this video is not intended nor implied to be a substitute for professional SCUBA Training or recommendations for every manufacturer. All content, including text, graphics, images, and information, contained in this video is for general information purposes only and does not replace training from a qualified Dive Instructor or specific requirements from equipment manufacturers.

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