Question: If there are a couple of scenes where Pascal, the chameleon, changed colors not to blend with objects but only due to his emotions. Is it possible for a real chameleon to do, or is it something only Pascal can do? In other words, is it something a chameleon can do only in a cartoon?
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Answer: The ability of a number of chameleon species to change colours is generally used a form of social signalling - it's a common misconception that they shift colour in order to blend in with their surroundings. Although some species of chameleon have displayed the ability to use their colour changes as a primitive form of camouflage, most only change in response to social situations or changes in their physical or emotional state. So, yes, it's very possible that Pascal could change colour due to his emotions, in fact, it's really the norm.
Tailkinker ★