Octopus, cuttlefish, squid, and other members of the cephalopod class are masters of color-change and camouflage. Here’s an octopus:
But …
Cephalopods, in almost all cases, are said to be colorblind.
-Peter Godfrey-Smith, in Other Minds: The Octopus, the Sea, and the Deep Origins of Consciousness
How do they do it?
Fanatic Cook 
Bix, I love this–but I didn’t know they’re color blind, nor did Gary. So what part of them executes the color-change action? I’ve seen the top vid, but not the second one–so probably the answer to my question is there. Utterly fascinating. Sad that their lifespan is so short.
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I feel like my lifespan will be too short to discover all these things!
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So the skin “sees” independent of the eyes or brain. Wow, just wow….
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