A social cichlid fish failed to pass the mark test

@article{Hotta2017ASC,
  title={A social cichlid fish failed to pass the mark test},
  author={Takashi Hotta and Shiho Komiyama and Masanori Kohda},
  journal={Animal Cognition},
  year={2017},
  volume={21},
  pages={127-136}
}
Since the pioneering work in chimpanzees, mirror self-recognition (MSR), the ability to recognise oneself in a mirror, has been reported in great apes, Asian elephants, dolphins, and some social birds using the mark test, in which animals that possess MSR touch an imperceptible mark on their own bodies only when a mirror is present. However, giant pandas, which are solitary, failed to pass the mark test, suggesting that MSR evolved solely in highly social animals. In contrast to the increasing… CONTINUE READING