"At the age of 21 in 1971, Watson was a co-founder of Greenpeace and, now aged 74, he tells Euronews Green that it was an encounter with a harpooned sperm whale in 1975 which spurred him on to fight to bring whaling to an end.
'As the whale came out of the water, I looked into his eye and I saw my own reflection in that eye, but I also saw understanding,' he reminisces.
'The whale understood what we were trying to do, and instead of coming forward and crushing us, he began to slide back and made a big effort in doing so. He could have killed us and chose not to do so.'
It was this meeting which made Watson so passionate about his work."