gray
blue
really, octopus's actually have BLUE blood. lol xD
Both squids and octopuses have blue blood.Their blood is this colour because they use an oxygen-carrying molecule in their blood that contains copper.
an octopus has 3 hearts and an octopus can change its colour according to its surrondings
yes
yes the octopus use camouflage for hunting and hiding
Blue
The octopus’s blood is blue
yes yes it can
An octopus can change colors into whatever it feels like being.
Blue
it is oil