Footage, filmed in Canada yesterday, of a man explaining how and why goldfish in Beaver Lake in Montreal are dying. br br The filmer later wrote online: "The goldfish in Beaver Lake (Montreal Quebec) are dying in record numbers.br br "The city does't know why, but it is obvious a lack of oxygen in the water." br br "We saved about 15 this weekend (transferred to properly aerated pond) - all creatures great and small," he continued.