Have a look at this octopus. It camoflages itself while it walks around.
Two tiny species of tropical octopus have demonstrated a remarkable disappearing trick. They adopt a two-armed â€˜walkâ€™ that frees up their remaining six limbs to camouflage them as they slink away from trouble.
View movies below the fold.
This one is Octopus aculeatus. Itâ€™s holding six arms up stiffly to look like a clump of algae and walking on the other two:
This one is Octopus marginatus, it wraps six arms around itself to hide itâ€™s shape while walking on two arms: