Sperm Whales Dive 1000s of meters below the surface in search of food, entering into a completely alien enviroment, such a strange place for a mammal of all creatures to be and it isn't just sperm whales. There are at least a dozen species of whales that have adapted to dive into the abyss for their food and these whales aren't closely related and have evolved to be deep sea divers on separate occasions. So why don't these beasts hunt near the surface, what lures these giants into the deep?

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Sources:
https://www.int-res.com/articles/meps...
https://pubmed.ncbi.nlm.nih.gov/16689....
https://peerj.com/articles/715/
https://www.researchgate.net/figure/M...
https://www.st.nmfs.noaa.gov/spo/SPO/...
https://www.ncbi.nlm.nih.gov/pmc/arti...
https://www.researchgate.net/figure/P...