Rare shark nursery found in Atlantic

Blackmouth cat sharks and sailfin rough shark. (Picture: Marine Institute)
Blackmouth cat sharks and sailfin rough shark. (Picture: Marine Institute)

Marine scientists investigating Ireland’s deepwater coral-reef systems 200 miles out in the Atlantic have discovered a rare shark nursery.

The area was filmed by the ROV Holland 1, deployed from the research vessel ILV Granuaile during a SeaRover survey by Ireland’s Marine Institute in July, but the discovery has only just been announced.

Large concentrations of egg-cases, known as “mermaids’ purses” and suggesting that the area is an assembly point for female sharks, were filmed on the seabed as deep as 750m.

Also read: Swell shark emerges in apparent virgin birth

The presence of a large school of blackmouth cat sharks (Galeus melastomus), a species abundant in the north-east Atlantic, suggested that the eggs were of this species, though one individual of a more unusual and solitary species, the sailfin rough shark (Oxynotus paradoxus), was also observed.

The sailfin roughshark, IUCN-listed as Near Threatened, can grow to 1.2m long. It was thought that the individual observed might have been feeding on the eggs.

“No pups were obvious at the site and it is believed that the adult sharks might be utilising degraded coral reef and exposed carbonate rock on which to lay their eggs,” said David O’Sullivan, Chief Scientist on the SeaRover survey. “A healthy coral reef in the vicinity may act as a refuge for the juvenile shark pups once they hatch.”

He said that further study of the site “will answer some important scientific questions on the biology and ecology of deepwater sharks in Irish waters.”

The shark nursery lies within one of six offshore Special Areas of Conservation (SACs) in Irish waters, designated under the EU Habitats Directive for Annex 1 reefs.

The SACs host a diverse range of marine animals including seafans, sponges, worms, starfish, crustaceans and various fish, and many of these species were seen in the area. The exploration was jointly funded by the Irish Government and the EU’s European Maritime & Fisheries Fund.

 

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@timpell49
#AskMark Mark great video love your content I recently had my cylinder hydro tested it was filled with air how long can you keep the air in the cylinder before you use it .Also dive shop can drain the air and fill with nitrox?
#scuba #scubadiving #scubadiver

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How Long Can You Keep Air in a Cylinder? #AskMark #scubadiving

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JANUARY 18-26: Boot Düsseldorf (International Boat Show)
FEBRUARY 1-2: Duikvaker
FEBRUARY 21-23: European Dive Show (EUDI)
FEBRUARY 21-23: Diving Resort Travel (DRT) Show, Malaysia
MARCH 1-2: GO Diving Show (The UK Dive Show)
MARCH 15-16: ADEX Ocean Festival / OZTek Australia
MARCH 28-30: Mediterranean Diving Show
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00:00 Introduction
01:35 Scuba.com Ad
02:35 Duikvaker
03:15 EUDI
04:23 DRT
05:04 GO Diving Show UK
06:24 ADEX OZTek
07:06 Mediterranean
07:34 ADEX
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08:51 Scuba Show
09:36 MIDE
10:06 GO Diving ANZ
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Upcoming Dive Shows in 2025 #scubadiving #diveshow

US diver Barrington Scott has set a verified Guinness World Record for the fastest time to scuba dive across all seven continents.Cartagena City Council says it is preparing to tighten access to the Cueva del Agua (Water Cave) system in southern Spain, following the death of a 37-year-old female diver there on 18 January. And an underwater habitat builder has just extended the record for longest time spent submerged. 

https://divernet.com/scuba-news/scuba-dash-across-7-continents-brings-world-record/
https://divernet.com/scuba-news/health-safety/spanish-cave-divers-death-prompts-calls-for-controls/ 
https://www.kentucky.com/news/nation-world/national/article299289964.html
https://divernet.com/scuba-news/pod-builder-completes-120-days-under-sea/

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US diver Barrington Scott has set a verified Guinness World Record for the fastest time to scuba dive across all seven continents.Cartagena City Council says it is preparing to tighten access to the Cueva del Agua (Water Cave) system in southern Spain, following the death of a 37-year-old female diver there on 18 January. And an underwater habitat builder has just extended the record for longest time spent submerged.

https://divernet.com/scuba-news/scuba-dash-across-7-continents-brings-world-record/
https://divernet.com/scuba-news/health-safety/spanish-cave-divers-death-prompts-calls-for-controls/
https://www.kentucky.com/news/nation-world/national/article299289964.html
https://divernet.com/scuba-news/pod-builder-completes-120-days-under-sea/

#scuba #scubadiving #scubadiver

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YouTube Video UEw2X2VCMS1KYWdWbXFQSGV1YW84WVRHb2pFNkl3WlRSZS4yNkZBOTQyMkYxQkQyMzc2

Spanish Cave Closed After Fatality #scuba #podcast #news

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