DEFENSE

To protect themselves from being attacked by predators also human, usually the main octopus tends to hide from be detected as an octopus. Other than that, octopuses have several secondary defenses (only use when seen by the predator) which are:

·         ink sacs

-The majority of octopuses can eject a thick blackish ink in a large cloud to escape form the predators. The ink is made up from melanin (which is used in hair product).

-The function of ink is to reduce the effectiveness of olfactory organs, that was use to smell for hunting, for example sharks.

http://www.youtube.com/watch?v=IeBPKnW4HmE

·         Color changing

-When under attack, octopuses will make use the Chromatophores to change their apparent color according to the environment.

-Chromatophores contain yellow, orange, red, brown and black pigments.

-The color changing was one of the methods for the octopuses to communicate and warn other octopuses

-Change the texture to seaweed, lizards, soil and so on.

http://www.youtube.com/watch?v=m1jb18vaBIg