https://www.science.org/content/article/octopus-quick-costume-changes-are-costly-affairs
Assuming the first generation octolings and inkings had basically this level of effort to change color, even if they then evolved and optimized over many generations, I wonder if a series of color changes would still at least count as cardio for the ones in Splatoon? (Also explaining why rapid multiple color changes aren't apparently common.)
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