A cuttlefish transmitting social information via pattern and color change. Apparently, this display means he’s really pissed off. Watch till the end and you’ll be in no doubt.

All cephalopods; cuttlefish, squid, and octopus use the same remarkable technique to communicate among their kind and camouflage themselves.

Close up of a squid’s color-changing cells called chromatophores. Amazingly these cells blend shades to create colors outside their individual range much as we can blend red, green and blue to create any color. Odder still, all cephalopods appear to be color blind.

Finally, here’s an octopus giving a practical demonstration of using chromatophores for camouflage.

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