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Creature Feature: Porbeagle

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In this series, the Shark Trust will be sharing amazing facts about different species of sharks and what you can do to help protect them.

This time we’re showcasing the robust Porbeagle, one of the only known sharks that may love to play..

Shaped like a rugby ball, this muscular stocky shark is incredibly hydrodynamic and built for endurance. Dark grey-blue in colour with a white belly, they have a pointed snout and large black eyes.

Porbeagle’s belong to an elite group of sharks known as the mackerel sharks. These include some of the most powerful and agile sharks in the world, such as the White Shark and Shortfin Mako. This group are endothermic, so can keep themselves nice and warm, due to a remarkable adaptation known as a rete mirabile. This makes them more efficient hunters and able to tolerate colder waters.

Porbeagle’s look a lot like White Sharks, so are often mistaken for them. As they’re found in UK waters, this has led to many false reports of White Sharks in the UK. But Porbeagle’s are around half the size. Although still a large shark, the biggest Porbeagle on record is 3.6m. While the largest White Shark is 6m.

Found worldwide in cold-temperate waters, Porbeagle’s are strong swimmers. Travelling thousands of miles in search of food and to give birth. One individual, tagged in Irish waters, journeyed over 2,000 miles to Newfoundland in Canada. A known mating ground for Porbeagle’s.

Porbeagle’s may live on their own, or in small groups made up of similar sized or same sex individuals. With males and females coming together usually in September-November to mate. Yet in some places this can take place in January.

These sharks reproduce slowly, so are extremely vulnerable to destructive fishing. Females take 12-16 years to reach sexual maturity, males 6-10 years. After 8-9 months, females will give birth to litters of just 1-5 pups, which are relatively large at 60-80cm long.

Two distinct populations exist – the north Atlantic and south Pacific. Individuals from these areas don’t seem to mix, resulting in key differences. North Atlantic Porbeagle’s get a lot bigger, and don’t tend to live as long as those in the south Pacific.

During the day Porbeagles tend to spend their time in deeper waters, rising to the surface at night. They’re opportunistic feeders, mostly eating small fish – such as mackerel, whiting and herring – as well as octopus, squid and cuttlefish.

Highly inquisitive, Porbeagles have been seen chasing each other, rolling at the surface, and even pushing around floating objects and kelp. Could they be playing? Currently there are no scientific studies to back this up. But what an interesting study that would be…!

  • SCIENTIFIC NAME: Lamna nasus
  • FAMILY: Mackerel Sharks (Lamnidae)
  • MAXIMUM SIZE: 3.6m
  • DIET: Small fish & squid
  • DISTRIBUTION: Wide-ranging in temperate waters (except North Pacific).
  • HABITAT: Coastal and oceanic waters from 0-1,800m deep. Prefers temperatures below 18°C but can tolerate -1–23°C.
  • CONSERVATION STATUS: Vulnerable

For more amazing facts about sharks and what you can do to help the Shark Trust protect them visit the Shark Trust website by clicking here.

Header Image: Doug Perrine / Alamy

The Shark Trust is the leading UK-based shark conservation charity. The team works globally to safeguard the future of sharks, and their close cousins, the skates and rays. Engaging with a global network of scientists, policymakers, conservation professionals, businesses and supporters, to further shark conservation. Established in 1997 to provide a voice for UK sharks, the Shark Trust has an ever-growing number of passionate supporters. And together we're creating positive change for sharks around the world. Want to join us and help protect sharks around the world? Click here! www.sharktrust.org

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Saba’s Plan for a Coral Comeback

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Saba

Saba has an exciting new initiative to restore its coral reefs. This new project, running from 2024 to 2026, will focus on reviving key species in the island’s underwater ecosystems. With a collaborative team from the Saba Conservation Foundation (SCF) and Van Hall Larenstein (VHL) University of Applied Sciences, the project aims to restore both corals as well as sea urchins.

This initiative is centered around coral restoration, specifically reviving two essential coral species—staghorn coral (Acropora cervicornis) and elkhorn coral (Acropora palmata).  By mapping parent colonies and using a technique known as coral gardening, SCF will create and maintain coral nurseries. These corals will eventually be outplanted at key reef sites around Saba to not only expand the number of coral colonies, but also provide essential fish habitat. The project focusses on installing coral nurseries, training staff with the newest techniques and starting with the restoration of key reef sites.

Saba

Reef Cleaners to the Rescue

It’s not just corals getting a makeover—this project also shines a spotlight on the essential role of grazers, particularly sea urchins. VHL is leading the charge on cultivating and restocking two key sea urchin species, West Indian sea egg (Tripneustes) and long-spined sea urchin (Diadema), known for their ability to keep algae in check. By removing algae, which are important competitors of corals, they help the coral to thrive. By restoring these “reef cleaners,” Saba’s project will give corals the breathing room they need to grow, setting the stage for a healthier, more balanced marine ecosystem.

From Tiny Urchins to Big Goals

The project will be funded as part of the Dutch Government’s Nature and Environment Policy Plan (NEPP) 2020-2030 for the Caribbean Netherlands, a comprehensive initiative aimed at conserving and restoring the unique natural environments of the Dutch Caribbean islands, including Saba, St. Eustatius, and Bonaire. This project is aiming for big milestones:  build and maintaining coral nurseries, the expansion of urchin cultivation facilities, and the creation of a dedicated research center. By 2026, the project hopes to ramp up coral and grazer restoration, with the ultimate goal of extending these efforts across the Dutch Caribbean. By linking local initiatives to broader regional goals, Saba’s restoration project promises to leave a lasting impact on both the environment and the community.

Find out more about the DCNA at dcnanature.org.

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Reef-World marks two decades of marine conservation: strengthening impact amid coral reef threats

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reef world foundation

Empowering ocean stakeholders to tackle future challenges and ensure the survival of coral reefs and humanity

2024 marks the 20th Anniversary of The Reef-World Foundation’s tireless efforts for global coral reef conservation. The UK charity is the international coordinator of the UN Environment Programme’s Green Fins initiative, known as the leading voice in sustainable marine tourism. Today, Reef-World released its 2023-2024 Impact Report outlining a year of substantive growth and impact in its marine conservation programmes. 

Impact Report Highlights:

  • Impressive improvements in environmental behaviours to protect coral reefs by the marine tourism industry as the global participation of Green Fins increases.
  • Continued capacity building for government and NGO staff to effectively manage marine tourism activities in Asia, Caribbean and Red Sea regions. 
  • For the first time in Green Fins’ 20-year history, tourism operators have achieved ‘Best Environmental Performer’ status by demonstrating the lowest possible environmental impact in their environmental assessments. In 2024, three dive operators achieved this challenging milestone. 
  • Significant increases in global participation of Reef-World’s innovative digital conservation tools.
  • 138 Green Fins dive operator members achieved the strict threshold for PADI Eco Center recognition.
  • Developed four new educational materials and translated two into 16 languages to support the marine tourism industry in achieving sustainability targets.
  • Establishing a new Reef-World Development strategy and recruiting new roles – Development and Programmes Managers. 
  • Reef-World’s board welcomes new Chair and Trustees strengthening organisational leadership. 

Reef-World started as a one-person mission to inspire and empower communities to act in conserving and sustainably developing coral reefs and related ecosystems. Today, the team of 12 continues to meet this mission by inspiring and empowering the global marine tourism community to be exemplary sustainability leaders by using the Green Fins guidelines and tools to simultaneously use and protect the world’s precious reefs. 

In April 2024, the fourth global coral reef bleaching event was confirmed. Reef-World’s work has never been more urgent as the marine environment, and the benefits they provide humanity, continue to be eroded by global threats. The reduction of local threats, like those from the marine tourism industry, is an essential step to ensuring a future where coral reefs survive and continue to support the millions of people who depend on their ecosystem benefits. Reef-World’s work buys time for coral reefs and related ecosystems to be resilient to the impacts of global threats. 

 

“Right now our corals are facing the greatest fight of their existence as the terrifying predictions of the steps towards their complete extinction are starting to come true. But all is not lost, reefs are resilient and they have existed on this planet for millions of years. We must take action now, to buy time for reefs by reducing threats facing them and allowing them to react and adjust to the changing environment they need to survive in.” – Chloe Harvey, Executive Director

Looking Forwards: 

Like coral reefs, the Reef-World team needs to be resilient in the face of the complex challenges of the conservation sector. Reef-World has invested significantly in developing a Culture of Care to ensure the well-being of its team on a daily basis, continuing to be an exemplary employer to enable its team to best achieve the mission for coral reef conservation.

With the foundations of a Culture of Care and organisational development laid, Reef-World is emerging from the end of a natural organisation life cycle, that brings the challenges of growth and scale, stronger than ever. With a new strategy in place to generate much needed resources, Reef-World is excited for the opportunities to leap forward, continue to scale our impact and lean into new innovations and untapped opportunities for marine conservation. 

We continually strive to become a forward-thinking organisation that delivers on our goals and commitments to our stakeholders with fresh approaches and not being afraid of steering away from a “normal approach.” This approach is not only applied to our programmes of work but also internally and carries over to our Culture of Care for our team.” — JJ Harvey, Operations Director

reef world foundation

The Reef-World Foundation is immensely grateful for the continued support of its grant funders: UN Environment Programme, IUCN’s Blue Natural Capital Financing Facility, Adventure Travel Conservation Fund, PADI Aware Foundation, and World Nomads Footprints Program.

Reef-World would also like to express its gratitude to international partners whose vital support has resulted in significant tangible benefits for our work and mission: PADI; Professional SCUBA Schools International (PSS); Explorer Ventures; 1% for the Planet; ZuBlu; Snorkel Venture, GSTC; Dive O’Clock; Seven Dragons; DiveAssure and Eco Beach, without whom these achievements would not be possible.

The full 2023–2024 Annual Impact Report is available on Reef-World’s website.

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