<i id='8F8C26FC34'><strike id='8F8C26FC34'><tt id='8F8C26FC34'><dfn draggable="2ac89f"></dfn><font dropzone="40ce37"></font><ins date-time="fe78c8"></ins><pre date-time="5d535f" id='8F8C26FC34'></pre></tt></strike></i> By Helen Briggs and Victoria Gill for BBC News
A humpback whale. Photo: konart/123RF
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