Stock Photo - Researcher Stephanie Martin takes a blubber biopsy using an arrow fired from a crossbow of an adult blue whale Balaenoptera musculus surfacing off the edge of the continental shelf at the South Orkney islands, Antarctica, Southern Ocean MORE INFO At up to 32 9 metres 108 feet in length and 172 metric tonnes 190 tons or more in weight, it is the largest animal ever known to have existed Since protection efforts the blue whale is starting to make a recovery throughout much of its range

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