Atlantic: Imagine arriving at a region famed for its foreststhe Pyrenees or the Rockies, perhapsand discovering that all the trees had vanished. Where just a few years ago there were trunks and leaves, now there is only moss. Thats how Thomas Wernberg and Scott Bennett felt in 2013, when they dropped into the waters of Kalbarri, halfway up the western coast of Australia.
They last dived the area in 2010. Then, as in the previous decade, they had swum among vast forests of kelpa tagliatelle-like seaweed...