<i id='90F4D4C36F'><strike id='90F4D4C36F'><tt id='90F4D4C36F'><bdo draggable="db9ad5"></bdo><dfn dropzone="cb6cda"></dfn><font date-time="d52f3b"></font><pre date-time="3e15b8" id='90F4D4C36F'></pre></tt></strike></i> By Helen Briggs and Victoria Gill for BBC News
A humpback whale. Photo: konart/123RF
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