On December 12, Harvey Morash and Michael Gerhartz went diving at Grand Narrows, Cape Breton, where the two great basins of the Bras d'Or Lake* converge amidst the treacherous currents of the Barra Strait. Those currents make the water in this video disturbingly murky, but the fecundity of the sea life—the profusion of urchins, anemones, not to mention perch, lobster, and cod—is something to see. The aerial photo at right shows the two bridges, highway and railway, that span the strait, from Iona on the left to Grand Narrows on the right. * Lake? Lakes? An eternal argument. The Bras d'Or Lake Biosphere Reserve...