<i id='69B94C8F8B'><strike id='69B94C8F8B'><tt id='69B94C8F8B'><font lang="2f1fe1"></font><ins draggable="e7070a"></ins><small dropzone="a9ba68"></small><pre date-time="0019a4" id='69B94C8F8B'></pre></tt></strike></i> By Helen Briggs and Victoria Gill for BBC News
A humpback whale. Photo: konart/123RF
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