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Marine Life & Conservation Blogs

BLUE EARTH – Future Frogmen Podcast Series – Citizens of the Ocean

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A series of conservation educational podcasts from Future Frogmen, introduced by Jeff Goodman.

Citizens of the Ocean

Peter Neill is an author and an editor on environmental and ocean issues, and the founding Director of the World Ocean Observatory, a web-based place for education and information exchange on the health of the ocean. Hear Peter’s commitment to building an expansive global community of Citizens of the Ocean to promote and conserve marine resources for the future of all mankind.


Richard E Hyman Bio

Richard is the Chairman and President of Future Frogmen.

Born from mentoring and love of the ocean, Richard is developing an impactful non-profit organization. His memoir, FROGMEN, details expeditions aboard Jacques-Yves Cousteau’s famed ship Calypso.

Future Frogmen, Inc. is a nonprofit organization and public charity that works to improve ocean health by deepening the connection between people and nature. They foster ocean ambassadors and future leaders to protect the ocean by accomplishing five objectives.


You can find more episodes and information at www.futurefrogmen.org and on most social platforms @futurefrogmen.

Jeff Goodman is the Editor-at-Large for Scubaverse.com with responsibility for conservation and underwater videography. Jeff is an award-winning TV wildlife and underwater cameraman and film maker who lives in Cornwall, UK. With over 10,000 dives to his credit he has dived in many different environments around the world.

Marine Life & Conservation

Jeff chats to… Joanna Ruxton MBE, filmmaker and conservationist, about her life and work (Watch Video)

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“If you really care about our oceans and ultimately the planet on which we all live then do listen to what Jo Ruxton has to say about how we need to act now if we are to stop and reverse this destructive global trend we have created for ourselves and all other life.”

Jeff Goodman

In this exclusive Zoom interview, Jeff Goodman, Scubaverse Editor-at-Large, chats to Joanna Ruxton MBE, film maker and conservationist, about her life and work, ‘A Plastic Ocean’ (Netflix) and her new project Ocean Generation.

Jo graduated from London University with a degree in Marine Science.  She started the first marine programme for WWF in Hong Kong, where she raised her family, and was a key advocate for the establishment of the first marine parks there.

She returned to live in the UK and was a Producer at the BBC Natural History Unit and a lead member of the BBC’s diving team, producing and directing underwater sequences since the first days of filming on Blue Planet.

Disappointed in the lack of conservation messages in BBC films, she left in 2008 to work independently to produce, A Plastic Ocean, (Netflix).  She founded the charity, Ocean Generation (formerly Plastic Oceans).

She lives in Cornwall close to her daughters and their families and when not diving on location she enjoys cold-water sea swimming, whatever the season.  Jo was awarded an MBE in the 2022 New Year’s Honours for services to marine conservation.

About Ocean Generation | UK Charity No. 1139843

Ocean Generation is an inclusive global movement that exists to restore a sustainable relationship between humanity and the Ocean.

Founded in 2009, the charity was established initially to support the production and message of our award-winning documentary feature, ‘A Plastic Ocean’, named by Sir David Attenborough as “one of the most important films of our time” and ignited mass public awareness about the impact of plastic on our Ocean.

No ordinary NGO, Ocean Generation combines the disruptive energy of a youth collective with years of experience in storytelling through science and film.

Find out more at www.oceangeneration.org


Rather listen to a podcast? Listen to the audio HERE on the new Scubaverse podcast channel at Anchor FM.

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Marine Life & Conservation Blogs

Creature Feature: Great Hammerhead 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.

We’re kicking off the new year with a classic shark – the Great Hammerhead. Known for their distinct silhouette, the Great Hammerhead is the largest species of hammerhead on the planet.    

With a distinct notch on the centre of their head, the Great Hammerhead is light grey or brown above and white below. Reaching a maximum size of around six metres, this is a big shark. There are nine species of hammerhead. Identifying them often relies on looking at head shape. The Great Hammerhead has a much straighter front edge compared to the Scalloped and Smooth Hammerheads. 

The unique hammer-shaped head (a.k.a. cephlafoil) improves their manoeuvrability. As the position of their eyes enable them to see 360°. And enhances their ability to detect electrical currents, a sixth sense that all sharks have. Sharks have lots of tiny pores covering their head and snout, called ampullae of Lorenzini. These are extremely sensitive and can detect even the faintest of electrical fields. Including those generated by the Earth’s geomagnetic field, or muscle contractions in prey. The broad flat head of a hammerhead provides a much larger surface area for these pores. Which is why they’re so good at finding prey – such as stingrays – completely buried beneath the sand. 

Great Hammerheads are nomadic and seasonally migratory. They move towards the equator during the winter and then towards the poles during the summer. Unlike other species, they are solitary and migrate up to 1,200km (750 miles) alone.

The Great Hammerhead is Critically EndangeredPopulations have declined in recent years. They are targeted and also caught as bycatch.

Although large and powerful, research has shown that Great Hammerheads are quite fragile. They are particularly vulnerable to the stress of capture. Recent research has found that individuals that are hooked have a 50% chance of dying following release. Combating the declining populations comes down to, as always, implementing scientifically informed catch limits and enforcing these. 

The species is important for dive tourism in some areas. In the video below, head of marketing for the Shark Trust – Caroline, takes in the view as a Great Hammerheads cruise by. They are a true sight to behold.

SCIENTIFIC NAME:  Sphyrna mokarran

FAMILY:  Sphyrnidae

MAXIMUM SIZE:  610cm 

DIET:  Varied. Preference for stingrays, other rays and marine catfish.

DISTRIBUTION: Worldwide, tropical seas. 

HABITAT:  Coastal-pelagic and semi-oceanic. Close inshore to well offshore. 1-300m or more.

CONSERVATION STATUS: Critically Endangered


Images from Frogfish Photography 

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.

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