Camo: "Two deep-ocean species of cephalopod, an octopus and a squid, can go
from transparent to opaque in the blink of an eye, a new study finds." (active camouflage)
Smarts: despite a walnut size brain (distributed through its arms and head), the octopus displays tool use and play and some basic language skills.
Technology: manipulates stones and shells for tools.
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