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The characteristic hammer-shaped head is just becoming visible in this image of an embryonic bonnethead shark. The scale bar = 1 cm (Steven Byrum & Gareth Fraser / Department of Biology, University of Florida)
Marine Biology

Rare access: Hammerhead shark embryos

What have until now been the secrets of these sharks’ unique head development are revealed by GARETH J FRASER and his team at the University of

Hawksbill turtle on a coral reef - but they are going much deeper to feed (Jeanne A Mortimer)
Marine Biology

Tracking tropical turtles – deep down

Following them to the seabed in the Indian Ocean has revealed surprising feeding habits, says marine biologist NICOLE ESTEBAN of Swansea University Hawksbill turtles are critically

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Thousands of visitors swim at the sandbar to take part in the Stingray City experience, smearing on sun-tan oil before jumping in. Most commercial sunscreens are toxic to corals
North & Central America

Cayman coral problems in black & white

Marine biologist JOHN CHRISTOPHER FINE swaps Florida for an extended stay in the Cayman Islands – and is disturbed by what he finds while diving

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Diver portrait from the DJI Osmo Action 4 set to Normal colour and Wide lens
Cameras & Accessories

Is DJI action-cam really ‘better in low light’?

Initial excitement soon turns to disappointment when MIKE WARD diver-tests the DJI Osmo Action 4 in an overcast Yorkshire lake Chinese manufacturer DJI claims that its

severn 1999
General Wrecks

The strong man, the rebreather and the tunnel

The first rebreather received the roughest baptism imaginable 119 years ago – deep in the workings of the Severn Tunnel. The inventor said he’d never