Fish looks in mirror, sees something on its face
February 10, 2019 6:32 AM Subscribe
"A fish, the cleaner wrasse Labroides dimidiatus, shows behaviour that may reasonably be interpreted as passing through all phases of the mark test." The mark test, or mirror test, is a classic measure of whether an animal has self-awareness. The fish joins a short list of animals including great apes, a single Asiatic elephant, dolphins, orcas and the Eurasian magpie. The study has received mixed reviews, and the journal published a more cautious interpretation alongside the main article.