Crabs Armada

The wreck of the Rata Encoronada had lain on the ocean bed, a relic of the Spanish Armada defeated by the British. Now, after four centuries it had moved to within a quarter of a mile off the shore. How? There was only one way to find out. Boswell, an experienced deep sea diver, was sent down to investigate. Never in his wildest dreams could he have guessed that which he found lurking in the galleon amidst the skeletons of long dead sailors.