Sea snakes that ‘see’ through their tails

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Last Updated on February 21, 2019 by

DIVING NEWS

Sea snakes that ‘see’ through their tails

Olive sea snake

Divers trying to sneak up on an olive sea snake from behind shouldn’t be surprised if it takes rapid evasive action. The species has developed a light-sensing ability in its skin that allows it to “see” through its tail to avoid predators.

The sea snake, Aipysurus laevis, spends much of its time on the move hunting for prey, but although highly venomous its paddle-shaped tail could attract predators to attack it from behind.

“Often they rest during the day and they’ll curl up under a rock or coral,” said Jenna Crowe-Riddell, lead author of a new study from a research team led by Australia’s University of Adelaide.

21 February 2019

“They have this light-sensing ability in their tail in order for them to know or sense where their tail is at any time. It keeps them hidden from sharks and other predators.”

The olive sea snake usually grows to about 1m but can reach twice that length. It is one of only three of the 60 sea snake species, and the only one of more than 10,000 reptile species, known to respond to light on the skin in this way, says Crowe-Riddell.

“Using RNA sequencing, we could tell which genes are actually active when you shine a light on the skin,” she said. The team found that the rare ability resulted from a gene linked to melanopsin, a protein normally used by animals to sense overall light levels in their environment.

Some amphibians such as frogs have the protein in their skin, but use the information it provides to change colour rather than to move away like olive sea snakes. Other animals, including humans, use it to sense light levels and regulate their sleep-cycles.

“The same thing has evolved in some long-bodied fish and some forms of salamanders that have long bodies and paddle-shaped tails,” said Crowe-Riddell.

This week, it looks like DPV manufacturer ScubaJet has begun insolvency proceedings. PADI has distributed half a million dollars in their Project Aware campaign. Dorset coastguard have called off the search for a missing diver. And the Pearl Fleet has commented on a viral video of a shark-dive that didn’t go so well
https://taucher.net/diveinside-insolvency_proceedings_at_scubajet-kaz9246
https://divernet.com/scuba-news/conservation/padi-aware-distributes-500k-in-mission-hub-grants/
https://www.scubadivermag.com/raid-launches-ots-full-face-mask-programme/
https://www.scubadivermag.com/dorset-coastguard-call-off-search-for-diver/
https://divernet.com/scuba-news/health-safety/search-for-diver-off-dorset-stood-down/
https://divernet.com/scuba-news/health-safety/pearl-fleet-hits-back-as-maldives-shark-dive-slammed/
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The information in this video is not intended nor implied to be a substitute for professional SCUBA Training. 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.

This week, it looks like DPV manufacturer ScubaJet has begun insolvency proceedings. PADI has distributed half a million dollars in their Project Aware campaign. Dorset coastguard have called off the search for a missing diver. And the Pearl Fleet has commented on a viral video of a shark-dive that didn’t go so well
https://taucher.net/diveinside-insolvency_proceedings_at_scubajet-kaz9246
https://divernet.com/scuba-news/conservation/padi-aware-distributes-500k-in-mission-hub-grants/
https://www.scubadivermag.com/raid-launches-ots-full-face-mask-programme/
https://www.scubadivermag.com/dorset-coastguard-call-off-search-for-diver/
https://divernet.com/scuba-news/health-safety/search-for-diver-off-dorset-stood-down/
https://divernet.com/scuba-news/health-safety/pearl-fleet-hits-back-as-maldives-shark-dive-slammed/
Diving Into The Darkness Link:
https://www.scubadivermag.com/affiliate/mzsd


Become a fan: https://www.scubadivermag.com/join
Gear Purchases: https://www.scubadivermag.com/affiliate/dive-gear
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The information in this video is not intended nor implied to be a substitute for professional SCUBA Training. 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.

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@preethasebastian8921
Sharks and Yum Yum Yellow. What are your thoughts? #askmark
#scuba #scubadiving #scubadiver
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@preethasebastian8921
Sharks and Yum Yum Yellow. What are your thoughts? #askmark
#scuba #scubadiving #scubadiver
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YouTube Video UEw2X2VCMS1KYWdWbXFQSGV1YW84WVRHb2pFNkl3WlRSZS4zMzg4MjBBNzZCQzY5MDk4

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@emilyZA460
#AskMark hi! I was hoping you could help me understand the interchangeability of a DSMB and a simple SMB if I only plan to use it when I deploy it during my safety stop at 5 meters. I used the simple version for this purpose during my last liveaboard and despite occasionally having to reinflate at the surface due to some air escaping while being deployed underwater, it didn’t seem to be too problematic and so I was wondering if it’s necessary to have a DSMB for this purpose? The issue for me is that somehow I tend to end up misplacing my SMB quite often and so the price difference between the two makes it a more acceptable loss when it’s replacing the SMB regularly rather than the DSMB at double the cost
#scuba #scubadiving #scubadiver
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We partner with https://www.scuba.com and https://www.mikesdivestore.com for all your gear essentials. Consider using the affiliate link above to support the channel.

The information in this video is not intended nor implied to be a substitute for professional SCUBA Training. 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.

Diving Into The Darkness Website:
https://www.scubadivermag.com/affiliate/mzsd

@emilyZA460
#AskMark hi! I was hoping you could help me understand the interchangeability of a DSMB and a simple SMB if I only plan to use it when I deploy it during my safety stop at 5 meters. I used the simple version for this purpose during my last liveaboard and despite occasionally having to reinflate at the surface due to some air escaping while being deployed underwater, it didn’t seem to be too problematic and so I was wondering if it’s necessary to have a DSMB for this purpose? The issue for me is that somehow I tend to end up misplacing my SMB quite often and so the price difference between the two makes it a more acceptable loss when it’s replacing the SMB regularly rather than the DSMB at double the cost
#scuba #scubadiving #scubadiver
LINKS

Become a fan: https://www.scubadivermag.com/join
Gear Purchases: https://www.scubadivermag.com/affiliate/dive-gear
-----------------------------------------------------------------------------------
OUR WEBSITES

Website: https://www.scubadivermag.com ➡️ Scuba Diving, Underwater Photography, Hints & Advice, Scuba Gear Reviews
Website: https://www.divernet.com ➡️ Scuba News, Underwater Photography, Hints & Advice, Travel Reports
Website: https://www.godivingshow.com ➡️ The Only Dive Show in the United Kingdom
Website: https://www.rorkmedia.com ➡️ For advertising within our brands
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FACEBOOK: https://www.facebook.com/scubadivermag
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We partner with https://www.scuba.com and https://www.mikesdivestore.com for all your gear essentials. Consider using the affiliate link above to support the channel.

The information in this video is not intended nor implied to be a substitute for professional SCUBA Training. 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.

YouTube Video UEw2X2VCMS1KYWdWbXFQSGV1YW84WVRHb2pFNkl3WlRSZS4yOUY5MUNBMTM5RDMyREQ5

What's the Point of Fancy dSMBs? #askmark #scuba

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