To learn more about this topic, start your googling with these keywords: 

• 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.

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