5567 Chaetodon mertensii Cuvier, 1831 Chaetodontidae Butterflyfishes Acanthuriformes Teleostei Mertens' Butterflyfish Pacific Ocean: Ryukyu Islands to the Philippines and extending to Lord Howe, Rapa and Tuamoto islands. Replaced by <i>Chaetodon madagascariensis</i> in the Indian Ocean, <i>Chaetodon xanthurus</i> in southeast Asia, and <i>Chaetodon paucifasciatus</i> in the Red Sea (Ref. 37816). AMNH 88437 Chaetodon mertensi AMNH 211892 1969 Chaetodon mertensi AMNH 72801 1970 Chaetodon mertensi 15 N 124 E 2014 Chaetodon mertensii 51.3 m