An octupus sprays black ink so the prey cannot see then the octopus runs away...
By camouflage . Blending into the same color as its surrounding makes it difficult for prey to seek out the octopus
it stinks ink
by making itself look like a venomous sea snake
They protect themselves by squirting ink.
A leaf tailed gecko would be an example of one such animal as would the mimic octopus.
baned
TANGA
It hides in the sand or campfloges it'self to look like a octopus
Primarily it hides and uses camouflage (the mimic octopus is a master at this) to avoid enemies. However when attacked, it will squirt a cloud of ink at its attacker, blinding and confusing it. Under cover of the ink cloud it will jet away from danger. Octopus also have a sharp beak that can inflict damage on an attacker and in one case (the blue ringed octopus of Australia), this beak can inject a poison into its attacker.
A octopus doesn't make a shelter it make itself at home in human waste and caves.
they have no bones
by squirting ink that is black.The octopus squirts it and the ink will blind the predator and lets the predator escape