there are at least 4 species of butterflyfish , i like to see with my own eyes someday. among those the oblique butterflyfish is my favourite, can only be found in the following postal code, google map view with satellite
Address:
0.917211, -29.345014
http://www.researchgate.net/publication/256441001_Reef_fishes_of_St._Paul's_Rocks_new_records_and_notes_on_biology_and_zoogeography/file/3deec52293191c78ef.pdf