DC. I must mention this as a 5 pounder seems rather tiddlerish. We were diving on an ex hospital ship down your way. We had been advised to look out for shiny deposits as there was every chance of mercury, which, although a bit dangerous to handle is also very valuable. My mate Fred gave me a bit of a dig and pointed to some portholes. In the gloom, as I shone my light on said items, it appeared that 3 of them were full of mercury. Cutting a long deep story short, the mercury turned out to be a conger which was significantly bigger than 5 lbs. Fred shit himself and made a fairly hasty exit to