TIL: Octopuses have three hearts: two pump blood to the gills for oxygenation, and one circulates oxygenated blood to the body. This helps them thrive in low-oxygen environments, like the deep sea.

https://marinebio.org/octopuses/
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/17g1k66/til_octopuses_have_three_hearts_two_pump_blood_to/