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biitumen:  Dilation and constriction of these organelles, called chromatophores, are responsible for the squid’s ability to change color. Inside Nature’s Giants: The Giant Squid (2010)
biitumen:  Dilation and constriction of these organelles, called chromatophores, are responsible for the squid’s ability to change color. Inside Nature’s Giants: The Giant Squid (2010)