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Marine Life & Conservation Blogs

Creature Feature: The Spinner Shark

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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 month, it’s the turn (excuse the pun) of the Spinner Shark to swim into the spotlight. This shark is famous for its aerial acrobatics. 

The Spinner Shark (Carcharhinus brevipinna) is a species of requiem shark. From the same family as the Oceanic Whitetip, Bull and Silky Sharks, amongst others. This shark is slender-bodied, with a long and narrow pointed snout.  

A highly active shark that often forms schools. The unusual name comes from the way they feed. They swim rapidly upwards through schooling fish with their mouths open. Spinning and snapping in all directions, often shooting out of the water. Sharks can spin up to three times before falling back into the water. They also take part in feeding frenzies. Many sharks will also come together to eat “trash fish” dumped off trawlers. 

Spinner Sharks are highly migratory in the Gulf of Mexico and possibly elsewhere. Moving inshore during spring and summer to feed and mate. They often head south into deeper water for winter.  

Targeted for their meat, fins, liver oil and skin. This species is likely under-reported by fisheries, due to often being misidentified with Blacktip Sharks. . Their use of coastal habitats mean they are also vulnerable to exploitation and habitat degradation. The species is listed as Vulnerable by the International Union for Conservation of Nature (IUCN).  

SCIENTIFIC NAME:  Carcharhinus brevipinna

FAMILY:  Carcharhinidae

MAXIMUM SIZE:  304cm

DIET:  Primarily fish. Occasionally stingrays and cephalopods. 

DISTRIBUTION:  Coastal-pelagic. Warm-temperate to tropical Atlantic, Indian and Indo-West Pacific Oceans and Mediterranean Sea.
 

HABITAT:  Found to 200m. Close inshore (to depths of less than 30m) – off beaches, bays and river mouths. Less common in pelagic habitats offshore.

CONSERVATION STATUS: Vulnerable 


Banner Image and in-text Image from Matthew Paulson via Flickr

Distribution Map from Wikimedia Commons 


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.

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

Marine Life & Conservation Blogs

Book Review: Shells of the World

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Shells of the World: A Natural History by M.G. Harasewych

Shells of the world is a guide to the world of marine, shelled molluscs. And what a varied and interesting world it is. Some of my favourite things to find on a dive are detailed in this book, including disco clams (or Electric File Clams as they are correctly names), the cephalopods, giant clams and sea hares. There are also many on my wish list, top of which is the Nautilus.

Each chapter provides a detailed description of the species, along with beautiful images. You can dive deeper and discover where they live, both with global distribution and the habitat they prefer. Learn about their diet, reproduction and diversity.

Having dipped in and out of this lovely book over the past few weeks, it has inspired me to learn more about this group of animals that we see on most divers, wherever we are in the world. Some of the shells are incredibly intricate and beautiful. I have always agreed with never collecting, or touching, marine life. The description of a certain set of cone shells should be a warning to those that are happy to pick up marine life! One of the cone shells has a local name called the cigarette snail. Why? Because once the venom is in your system from this animal, you only have time to smoke one cigarette before the affects of the venom are fatal!

What the publisher says:

Mollusks are invertebrate animals with a remarkable natural history and a rich fossil record, and their shells are prized for their breathtaking variety and exquisite beauty. Shells of the World provides a wide-ranging look at the incredible diversity of marine mollusks. An informative introduction outlines the lineages covered, followed by a directory section, split into classes, that profiles a broad selection of different taxa to give a sense of their sheer numbers and variety.

  • Features hundreds of beautiful color photos, depicting both the live animals and their shells
  • Discusses mollusk evolution, anatomy, life cycles, behavior, and ecology
  • Describes unique characteristics, distribution, habitat, and size
  • Provides valuable insights into the conservation of the world’s marine mollusks
  • Ideal for malacologists and shell collectors everywhere

About the Author:

M. G. Harasewych is research zoologist emeritus and former curator in the Department of Invertebrate Zoology at the Smithsonian Institution’s National Museum of Natural History. A fellow of the American Association for the Advancement of Science, he is the author (with Fabio Moretzsohn) of The Book of Shells: A Life-Size Guide to Identifying and Classifying Six Hundred Seashells.

Book Details

Publisher: Princeton University Press

Hardcover

Price: £25

ISBN: 9780691248271

Published: 9th April, 2024

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The Ocean Cleanup Breaks 10,000,000 KG Barrier

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ocean cleanup

The Ocean Cleanup, the global non-profit project, has removed a verified all-time total of ten million kilograms (22 million lbs.) of trash from oceans and rivers around the world – approximately the same weight as the Eiffel Tower.

To complete its mission of ridding the oceans of plastic, The Ocean Cleanup uses a dual strategy: cleaning up the Great Pacific Garbage Patch (GPGP) to remove the plastic already afloat in the oceans, while stopping the flow of plastic from the world’s most polluting rivers.

Through cleaning operations in the GPGP and in rivers in eight countries, the cumulative total of trash removed has now surpassed ten million kilograms. This milestone demonstrates the acceleration of The Ocean Cleanup’s impact, while underlining the astonishing scale of the plastic pollution problem and the need for continued support and action.

While encouraging for the mission, this milestone is only a staging point: millions more tons of plastic still pollute our oceans and The Ocean Cleanup intends to continue learning, improving and innovating to solve this global catastrophe.

This announcement comes as governments from around the world meet to continue negotiations to develop a new legally binding instrument to end plastic pollution at INC4 in Ottawa, Canada. Representatives of The Ocean Cleanup will be in attendance and the organization will be urging decision-makers to collaborate towards a comprehensive and ambitious global treaty which addresses plastic at all stages of its life cycle and in all marine environments worldwide, including in areas beyond national jurisdiction.

It is encouraging to see that the need for remediation is reflected in the various options for potential treaty provisions. It is essential that the final treaty contains clear targets for the remediation of legacy plastic pollution, and reduction of riverine plastic emissions.

Tackling plastic pollution requires innovative and impactful solutions. The treaty should therefore incentivize the innovation ecosystem by fostering innovations that make maximal use of data, technology and scientific knowledge – such as those designed and deployed by The Ocean Cleanup.

‘After many tough years of trial and error, it’s amazing to see our work is starting to pay off – and I am proud of the team who has brought us to this point.’ said Boyan Slat, Founder and CEO of The Ocean Cleanup. ‘While we still have a long way to go, our recent successes fill us with renewed confidence that the oceans can be cleaned.’

The Ocean Cleanup was founded in 2013 and captured its first plastic in 2019, with the first confirmed catch in the GPGP coming soon after the deployment of Interceptor 001 in Jakarta, Indonesia. After surpassing one million kilograms of trash removed in early 2022, the non-profit project has since progressed to the third iteration of its GPGP cleaning solution, known as System 03, and a network of Interceptors currently covering rivers in eight countries, with more deployments set for 2024.

About The Ocean Cleanup

The Ocean Cleanup is an international non-profit organization that develops and scales technologies to rid the world’s oceans of plastic. They aim to achieve this goal through a dual strategy: stemming the inflow via rivers and cleaning up the legacy plastic that has already accumulated in the ocean. For the latter, The Ocean Cleanup develops large-scale systems to efficiently concentrate the plastic for periodic removal. This plastic is tracked and traced through DNV’s chain of custody model to certify claims of origin when recycling it into new products. To curb the tide via rivers, The Ocean Cleanup has developed Interceptor™ solutions to halt and extract riverine plastic before it reaches the ocean. Founded in 2013 by Boyan Slat, The Ocean Cleanup now employs a broadly multi-disciplined team of approximately 140. The foundation is headquartered in Rotterdam, the Netherlands.

For more information, visit: theoceancleanup.com and follow @theoceancleanup on social media.

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