There is a system for describing human facial expressions—Facial Action Coding System.
This has also been expanded for some animals (chimps, macaques, gibbons, orangutans, dogs, cats, horses). Alas, no dolphins.
There is a system for describing human facial expressions—Facial Action Coding System.
This has also been expanded for some animals (chimps, macaques, gibbons, orangutans, dogs, cats, horses). Alas, no dolphins.