In terms of outright top speed, the black marlin is the fastest fish in the ocean capable of accelerating to an unbelievable 129km/h (80mph). Steve Leonard joins a conservation team who tag marlin to follow their movements and witnesses their incredible power. Subscribe: http://bit.ly/BBCEarthSub

WATCH MORE:
New on Earth: https://bit.ly/2M3La96
Oceanscapes: https://bit.ly/2Hmd2kZ
Wild Thailand: https://bit.ly/2kR7lmh

Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of astounding, entertaining, thought-provoking and educational natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this.

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