For World Oceans Day the BBC Unplugged Team explore how vital Plankton really are.
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WATCH MORE:
Spongebob Squarepants: https://www.youtube.com/watch?v=ZEP_PJXnnNs
New on Earth: https://bit.ly/2M3La96
Oceanscapes: https://bit.ly/2Hmd2kZ
Wild Thailand: https://bit.ly/2kR7lmh
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