When Shearwater first introduced their new Perdix dive computer in December 2015, I was pretty excited.
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HMHS Britannic was the largest ship to sink during World War I. (Weighting in at almost 50,000-tons she was also the largest ship in the world).
Many argue she is one of the most beautiful, intact, well-preserved passenger liners accessible to divers. It is little wonder that these factors, and the story behind her construction and sinking continue to capture divers imagination.
This video shows a different type of agonistic behaviour, found in the blacktip reef shark. It was created to go with the article entitled Posturing Sharks, published in X-Ray Magazine #76
This sounds simple enough, but not when one considers that the reef - the third largest coral reef in the world - measures nearly 150 miles long and four miles wide. The question of where to place the new corals comes into play.
Enter biology professor Robert van Woesik, from Florida Institute of Technology.
Armed with a US$205,000 grant from the Florida Fish and Wildlife Commission, he and his team are working to identify the habitats and localities in the reef tract that offer optimal conditions for coral survival.
