Life is thought to be fairly sparse in the deep ocean, but an underwater probe equipped with bait managed to draw in more than 100 eels 3100 metres down in the Pacific
Source:
https://www.newscientist.com/article/2265810-swarm-of-pacific-eels-is-largest-group-of-fish-seen-in-the-abyss/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home