Discover key moments from history and stories about fascinating people on the official BBC Documentary channel: http://bit.ly/BBCDocs_YouTube_Channel

Simon visits a cutting edge laboratory devoted to breeding wild southern bluefin tuna.
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WATCH MORE:
Hiroshima: http://bit.ly/BBCHiroshima
Horizon: http://bit.ly/BBCHorizon
Best of Alan Partridge: http://bit.ly/BestOfAlanPartridge
Harry Enfield and Chums: http://bit.ly/HarryEnfieldAndChums

Welcome to BBC Studios, bringing you the best of British TV! Here you'll find classic comedy, gripping drama, as well as the best documentaries, science and history! Take a look at complete listings for all our shows - we've got plenty to keep you entertained!

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