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Why We Sucked At Counting Fish (Until Now)

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A new fish counting method has revealed there are ten times more fish in the sea than we previously thought.
If you liked this week’s video, we think you might also like these things:
Seeing the Sky as Galileo Saw it:
We try to leave jargon out of our videos, but if you want to learn more about this topic, here are some handy keywords to get your googling started:
- Milky Way: Earth's home galaxy
- The Malaspina Expedition 2010: A research project to explore ocean biodiversity by recreating the path of a late 18th Century scientific expedition.
- Sonar: A technique that uses soundwaves to map out underwater objects.
- Avoidance of Trawl: A behavior in which fish move out of the way of an incoming net, perhaps through bioluminescent signalling.
- Bioluminescence: Light produced by a living organism.
- Deep water fish: Fish who live more than 500m below the ocean surface in the Mesopelagic, Epipelagic, and Bathypelagic zones.
Species featured in this video:
- Stoplight loosejaws (Malacosteus niger)
- Common Fangtooth (Anoplogaster cornuta)
- Lanternfishes or myctophids (Family Myctophidae)
- Bristlemouths (Genus Cyclothone): The most populous vertebrate on Earth.
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A big thank-you to our supporters on :
- Today I Found Out
- Maarten Bremer
- Jeff Straathof
- Mark Roth
- Tony Fadell
- Muhammad Shifaz
- 靛蓝字幕组
- Jagdtiger
- Alberto Bortoni
- Valentin
- Antoine Coeur
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Credits (and Twitter handles):
Script Writer: David Goldenberg (@dgoldenberg)
Script Editor: Emily Elert (@eelert)
Video Illustrator: Ever Salazar (@eversalazar)
Video Director: Emily Elert (@eelert)
Video Narrator: Emily Elert (@eelert)
With Contributions From: Henry Reich, Alex Reich, Kate Yoshida, Omkar Bhagat, Peter Reich, Rachel Becker
Music by: Nathaniel Schroeder:
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References:
Kaarvedt, S., Staby, A., Aksnes, D.L. (2012). Efficient trawl avoidance by mesopelagic fishes causes large underestimation of their biomass. Marine Ecology Progress Series,456(1-6). Retrieved from
Broad, W. (2015). An Ocean Mystery in the Trillions. New York Times, D1. Retrieved from:
Xabier Irigoien, T. A. Klevjer, A. Røstad, U. Martinez, G. Boyra, J. L. Acuña, A. Bode, F. Echevarria, J. I. Gonzalez-Gordillo, S. Hernandez-Leon, S. Agusti, D. L. Aksnes, C. M. Duarte & S. Kaartvedt (2014). Large mesopelagic fishes biomass and trophic efficiency in the open ocean. Nature Communications, 5, 3271. Retrieved from
Kaarvedt, S. (2016). Personal Communication.
Duarte, C. (2016). Personal Communication.
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