Scientists report that a fish can pass a standard test of recognizing itself in a mirror—and they raise a question about what that means. Does this decades-old test, designed to show self-awareness in animals, really do that?. Since the mirror test was introduced in 1970, scientists have found that relatively few animals can pass it. Most humans can by age 18 to 24 months, and so can chimps and orangutans, says the test’s inventor, evolutionary psychologist Gordon Gallup Jr. of Albany College in New York.

Reflecting Nemo: Fish ‘passes’ mirror test. (2019, February 9). Philippine Daily Inquirer, pp. A1, A4.