Figure 3 | Scientific Reports

Figure 3

From: Squid adjust their body color according to substrate

Figure 3

Example pictures of the subjects over dark or light substrates showing the RGB score as provided by the Digital Color Meter on iMac. When white-squid moved over different substrates, we measured the area between eyes of the animal, and the area right above the ink sac on the top view SONY camera recording (Supplementary Video S3), because these areas are never transparent and thus their color-change corresponds with activity of animal chromatophores.

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