The largest turtle in the World From: National Museum Cardiff  The leatherback turtle on display at the National Museum Cardiff, is so-called because of its tough but flexible carapace in place of the usual hard, shell-like protection. Not only is it, as a species, the largest reptile in the sea: this particular example is the world's largest and heaviest turtle ever recorded by man, measuring almost 3m (9ft) and weighing 914 kilos (2016 pounds). The turtle was washed ashore after being drowned when trapped in fishing lines. The discovery attracted world-wide attention and offered a rare opportunity for scientists to study a species whose life is intriguing and little-known. Work on preserving the turtle took a year to complete.  This image forms part of the monthly 'Curators Choice' series from Rhagor, the collections based website from Amgueddfa Cymru - National Museum Wales.  What will your favourite item be?