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Marine Life & Conservation

Nurse Shark with rare skin pigmentation recorded in Honduras

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One of the defining features of nurse sharks is a brown coloration that is present over their entire body. However, earlier this year, recreational divers in Utila, Honduras stumbled upon a unique individual with a rare condition that completely alters the typical pigmentation pattern in the skin.

The finding was recently published in a new study, “Observations of hypomelanosis in the nurse shark Ginglymostoma cirratum,” in the Journal of Fish Biology, led by researchers at Beneath The Waves (BTW). Working with members of the Caribbean Shark Coalition, the team at BTW saw this reported finding as an opportunity to emphasize the value of citizen science for shark and ray conservation. The diverse, non-traditional author list of this publication demonstrates that science can and should be made accessible to those beyond the scientific community in order to add to the scientific database of sharks, marine life, and marine habitats.

This sighting became the first documented account of a nurse shark with piebaldism, a rare skin condition that results in a partial loss of body pigmentation, with eyes remaining as their regular coloration. The unique coloring made this nurse shark easily identifiable, and the divers saw it on two different dives in two different locations.

Piebaldism is part of a larger suite of pigmentation deficiencies called hypomelanosis. This includes albinism, which results in a complete loss of pigmentation in the skin and iris, and leucism which causes total or partial loss of body pigment and a blue coloration to the iris and body.

Hypomelanosis is incredibly rare in the animal kingdom, particularly in sharks, skates, and rays. Only about 5% of these species have been documented with these conditions, one being a tawny nurse shark with albinism, and another being a nurse shark with leucism.

In nature, if an animal relies on camouflage to hunt or avoid predation, unusual skin conditions could affect its ability to do this successfully, ultimately impacting its chance of survival. With the rarity of these conditions in sharks, little is known about their effects.

This particular individual was about an average size for the species, at approximately 6 feet in length. Because of this size, we can assume that it has been able to hunt and avoid predators successfully to reach maturity. Since nurse sharks have a generalist lifestyle where they eat a wide range of foods and can survive in a variety of conditions, this was somewhat expected. Even so, this rare observation calls for more research on the potential consequences of hypomelanosis on the survivability of sharks, skates, and rays. This is only the second time this species has been scientifically documented to have a skin condition that can affect their pigmentation.

Photos: Ellie Hopgood.

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Get ready for the Marine Conservation Society’s annual Great British Beach Clean this month

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Great British Beach Clean

The programme is one of the largest marine citizen science activities of its kind in the UK. Volunteers taking part will not only be clearing our beaches of litter, but help the Marine Conservation Society, the UK’s leading ocean membership charity, to gather vital data to create change for cleaner and healthier seas.

This year’s Great British Beach Clean is being sponsored by Ireland’s leading soup brand, Cully & Sully Soup, whose support is helping to raise awareness of marine litter and protect UK beaches from pollution.

To sign up for a beach clean, or organise your own, simply visit the charity’s website.

Great British Beach Clean

Key stats and facts

  • At last year’s Great British Beach Clean, 5,416 volunteers conducted 428 beach cleans over 10 days, surveying 64,139 metres of coastline. A total of 129,391 pieces of litter were collected, filling 1,426 bags and weighing 7,476 kg.
  • The Marine Conservation Society has recorded an average drop of 80% in carrier bags found on UK beaches since charges were introduced, showing that policies to reduce plastic work.
  • Data collected during the Great British Beach Clean contributes toward the charity’s annual State of our Beaches report. Last year’s report recorded a 14% increase in drinks-related litter.
  • The report also showed that nine out of 10 beach litter items found on beaches by Marine Conservation Society volunteers last year were made from plastic.
  • Sewage plays a large part in the pollution problem. In 2023, over 29,500 sewage-related items, including more than 21,000 wet wipes, were recorded across the UK and Channel Islands, with sewage-related items present on 72% of surveyed beaches.
  • Data from the Marine Conservation Society’s Great British Beach Clean contributes to a global database, International Coastal Cleanup.

Great British Beach Clean

Key messages:

  • Data collected by volunteers during the Great British Beach Clean shows the positive result of policies like carrier bag charges, and how they work to reduce litter on our beaches.
  • Plastic still remains the most common form of beach pollution – highlighting the urgent need for further action to tackle the single-use plastic problem such as charges, bans and deposit return schemes.
  • The Marine Conservation Society is calling for governments across the UK implement world-class deposit return schemes for drinks containers including glass, plastic, and cans, without any further delay. Currently the proposed scheme is set to start in October 2027, but with Wales being the only country to include glass.
  • The charity hopes that the recent bans on single-use plastics, such as cutlery, will lead to a noticeable reduction in the amount of single-use plastic cutlery polluting our beaches, much like the positive impact of the carrier bag charge.
  • Sewage-related pollution, such as period products and wet wipes, are still prevalent on our beaches. Governments of the UK must turn the tide on pollution and end untreated sewage damaging our marine environment.
  • You can support the charity by helping to clean up the UK’s beaches and collecting valuable data that supports efforts to address sewage pollution effectively.

Great British Beach Clean

ON THE DEPOSIT RETURN SCHEME:

Lizzie Price, Beachwatch Manager at the Marine Conservation Society: “It’s fantastic to see real-world evidence of the effectiveness of policies such as carrier bag charges in tackling pollution from single-use plastics. There’s no denying that these measures have helped to reduce litter on our beaches. However, we cannot afford to become complacent.

“Drinks-related litter, such as bottles and cans, were found on 97% of UK beaches surveyed last year. We need wider policies such as charges, bans, or deposits on more single-use items where possible, including the proposed deposit return schemes for plastic bottles, cans, and glass. We must keep moving towards a society that repairs, reuses, and recycles.”

Great British Beach Clean

ON SEWAGE POLLUTION:

Rachel Wyatt, the Marine Conservation Society’s Water Quality Policy & Advocacy Manager:

“Our seas cannot sustain the deluge of sewage that is being dumped into our waterways on a weekly basis. Our beach clean volunteers find thousands of sewage-related litter items washed up on the beaches every year, but it’s not just physical pollution that is harmful to us and marine life. Raw sewage contains a cocktail of bacteria, viruses, harmful chemicals, and microplastics which is a disaster for our ocean. Governments of the UK must turn the tide on pollution and end untreated sewage damaging our marine environment, so that we can all enjoy sewage-free seas.”

Great British Beach Clean

ON VOLUNTEERING:

Clare Trotman, Beachwatch Officer at the Marine Conservation Society, said: “The work we do at the Marine Conservation Society simply wouldn’t be possible without the dedication of our volunteers, who help gather crucial beach litter data. This information is invaluable in shaping scientific understanding and driving the changes needed to protect our precious marine environment.

“With beach cleans taking place all over the UK and Channel Islands, there are countless opportunities to get involved and support us this year. And if you can’t make it to the beach, you can still contribute by organising a local litter pick and survey in your area.”

Cully Allen from Great British Beach Clean sponsor, Cully & Sully Soup, said: “We are excited to be part of the UK’s biggest beach clean initiative for a third year. As a B Corp, doing good is at the core of what we do. We are always striving to do better internally as a business, but we really enjoy when we get to encourage and join our customers in doing good. We are looking forward to getting stuck into the beach cleans again this year, serving up our soup to the SOUPer volunteers and taking direct action on marine litter.”

Great British Beach Clean

The following beach cleans are currently set to take place:

Date Region County Beach & link
20/09/2024 Weston-Super-Mare North Somerset, England Uphill Beach
20/09/2024 Wirral Cheshire, England West Kirby Beach
21/09/2024 Weston-Super-Mare North Somerset, England Sand Bay Beach
21/09/2024 Cramond Edinburgh, Scotland Cramond Beach
21/09/2024 Aberdeen Aberdeenshire, Scotland Aberdeen City Beach
22/09/2024 Formby Merseyside, England Formby Beach
23/09/2024 Portsmouth Hampshire, England Southsea Beach
25/09/2024 Littlehampton West Sussex, England Littlehampton East Beach
27/09/2024 Swansea Glamorgan, Wales Swansea Beach
27/09/2024 Portstewart Londonderry, N. Ireland Portstewart Beach
27/09/2024 Cleethorpes Lincolnshire, England Cleethorpes Beach
27/09/2024 Brixham Devon, England St Mary’s Beach
28/09/2024 Rhoscolyn Isle of Anglesey, Wales Borth Wen Beach
28/09/2024 Charmouth Dorset, England Charmouth Beach
29/09/2024 Wallasey Merseyside, England New Brighton Beach

Find more information about the Marine Conservation Society at www.mcsuk.org.

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Marine Life & Conservation

Reef-World launch new toolkit in response to the current global coral bleaching event

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coral bleaching

The Reef-World Foundation – international coordinator of the UN Environment Programme’s Green Fins initiative – has launched a new coral bleaching toolkit in response to the 4th global coral bleaching event confirmed by the National Oceanic & Atmospheric Administration (NOAA) and International Coral Reef Initiative (ICRI) in April 2024.

The Green Fins Global Coral Bleaching Response Toolkit provides guidance to the marine tourism industry on how they can help manage and monitor the impacts of coral bleaching and get involved in recovery efforts. It features information about coral bleaching, including the causes, impacts and response strategies. The toolkit is compiled from a variety of readily available resources from multiple organizations and initiatives, such as ICRI, Coral Reef Alliance, Reef Check and NOAA, along with Green Fins materials, to ensure it is accessible to everyone. These resources cover methods for reducing local impacts, monitoring the reefs and engaging tourists and local communities.

coral bleaching

The El Niño phenomenon has been present since February 2023, which has led to persistently warmer temperatures being experienced around the world and has affected the sea surface temperatures. Coral bleaching has been recorded in all ocean regions ever since. While this event is widespread and serious, there is still hope as bleached corals are not dead corals. Corals can survive bleaching events and thrive if they are given the time to adapt to the changing climate.

“Coral reefs are under a huge amount of stress every day and that reduces their chance of recovery from bleaching events,” said Chloe Harvey, Executive Director at The Reef-World Foundation. “However, this time around the scientists have been watching the data closely, so we’re prepared. We understand what it means and we know what we need to do to respond to it. This global event calls for global action to protect these vital ecosystems for generations to come.”

coral bleaching

By equipping the industry with the necessary knowledge and tools, Reef-World hopes to empower these key stakeholders to play a crucial role in preserving the health and resilience of our precious coral reef ecosystems. Reef-World believes that with the right resources, the marine tourism industry can be a driving force in the fight against coral bleaching and contribute significantly to the long-term sustainability of marine environments.

With this momentum, other key players in the industry, such as PADI AWARE Foundation and NOAA, have gotten on board the campaign for more citizen scientists to help out in monitoring coral bleaching. With the toolkit available to all, The Reef-World Foundation is looking forward to more collaborative actions in the industry.

coral bleaching

Explore the toolkit on Green Fins’ website: greenfins.net/coral-bleaching

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