Claim: Octopuses release cephalopod ink into the water as an escape mechanism.
Evidence: Octopuses have numerous strategies for to defend themselves against predators , including the expulsion of ink , the use of camouflage and deimatic displays , their ability to jet quickly through the water , and their ability to hide.
Cephalopod ink is a dark pigment released into water by most species of cephalopod , usually as an escape mechanism.