New research finds that a fish species has passed the mirror self-recognition test indicating that fish have self-awareness, something formerly recognised only for apes, dolphins, elephants and crows. If correct, it has serious repercussions for the way fish are caught, they may be suffering tremendously in the process. journals.plos.org/plosbiology/article

If a fish can pass the mark test, what are the implications for consciousness and self-awareness testing in animals?

A marine fish, the cleaner wrasse, appears to perform all the appropriate behavioural responses during the mirror, or mark test. Does this mean that cleaner…