Octopuses have three Hearts, two of which are situated near the gills, which pump oxygenated Blood to the main heart. Because octopus blood is based on Copper compounds and not iron ones like ours, their blood is Blue.

On #WorldOctopusDay, 10 things you might not know about octopuses:

https://topicaltens.blogspot.com/2017/10/8th-october-world-octopus-day.html

#Octopus #facts #animals