Portuguese
baleia-cinzenta Catalan
balena grisa 
Medium-sized greyish-black whale of the northern Pacific.
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Little is known about the Western grey whale, and its breeding ground remains unknown.
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A pair of conjoined grey whale calves have been found by fishermen in a lagoon in Baja California, in Mexico.
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They have around 50 conical teeth, which they use to rip apart prey -from seals to grey whale calves.
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Unfortunately, only a genetic laboratory might be able to bring back now extinct species like the tuna or the grey whale.
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A Western grey whale is seen in the waters off north-eastern Sakhalin island in Russia in this handout picture taken in 2002.
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It is a grey whale surfacing, one of a species that migrates from the warm waters off Mexico to chilly Alaskan seas.
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-The West Pacific grey whale population is the most endangered in the world.
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Grey whales were previously thought to be the record holders, but their title was snatched in 2007 by humpback whales.
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Scientists say between 130 and 160 Western grey whales exist today compared to tens of thousands before the era of industrial whaling.