Florent's Guide To The

Tropical Reefs

Atoll Butterflyfish
Chaetodon mertensii
Atoll Butterflyfish
Also known as: Mertens' Butterflyfish
Category: Butterflyfishes
Scientific Name: Chaetodon mertensii
Size: Up to 5 in. (13 cm)  
Depth: 30-300 ft. (10-90 m)
Distribution: West Pacific, French Polynesia, Great Barrier Reef, Fiji
Chordata (Phylum) Chordates
└Vertebrata (Subphylum) Vertebrates
 └Osteichthyes (Parvphylum) Bony Fishes
  └Actinopterygii (Gigaclass) Ray-Finned Fish
   └Teleostei (Class) Teleosts
    └Acanthuriformes (Order)
     └Chaetodontidae (Family) Butterflyfishes
      └Chaetodon (Genus)
       └C. mertensii (Species)
WoRMS ID: 273347🔗
iNaturalist ID: 97176🔗

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© 2026 Florent Charpin