Evidence found
389 records across 20 countries and territories, 1902–2025.
Chaetodon mertensii · GBIF taxon key 2385528
Where has the Merten's Butterflyfish been recorded?
Chaetodon mertensii occurrence evidence comes from 389 records in 20 countries and territories, from 1902 to 2025. Most records come from Northern Mariana Islands.
- 389 records
- 20 places
- 36 years recorded
- — class
Observation evidence passport
Source coverage
CC0 GBIF Animalia occurrence facets, including country, month and year summaries.
Refreshed 2026-08-23. Inspect the taxon on GBIF.
What this means
The species has been recorded in the listed places in the stated source universe. Peak month: October.
11 months reach at least 10% of the peak facet count.
What this does not mean
repeated describes the record pattern, not a formal range, residency, abundance or conservation assessment.
A single record remains evidence of a recording, not proof that a population lives there.
Compare this animal’s observation pattern
When it is recorded
JFMAMJJASOND
Peak month: October. Records cluster in the months an animal is present and being looked for, so a summer peak can reflect observer effort as much as the animal.
Records over time
19022025
Recording effort has risen steeply almost everywhere since the 1990s, so a rising line usually shows more observers rather than more animals.
Where Merten's Butterflyfish has been recorded
The countries below show where occurrence evidence exists for Merten's Butterflyfish. They do not define a complete habitat range: survey effort differs by place, and historical or one-off records can appear alongside repeated presence.
| Place | Records | Share |
|---|---|---|
| Northern Mariana Islands | 151 | |
| Guam | 72 | |
| American Samoa | 56 | |
| French Polynesia | 32 | |
| Seychelles | 22 | |
| Fiji | 14 | |
| Tonga | 10 | |
| Australia | 6 | |
| New Caledonia | 5 | |
| Vanuatu | 4 | |
| Micronesia | 3 | |
| Indonesia | 2 | |
| Marshall Islands | 2 | |
| Solomon Islands | 2 | |
| United States Minor Outlying Islands | 2 | |
| ZZ | 2 | |
| Papua New Guinea | 1 | |
| Philippines | 1 | |
| Wallis & Futuna | 1 | |
| Samoa | 1 |
Related animals
Others in the family Chaetodontidae.
Ornate Butterflyfish
4,122 records
Reticulated Butterflyfish
3,674 records
Threadfin Butterflyfish
3,550 records
Redstriped Butterflyfish
2,918 records
Fourspot Butterflyfish
2,508 records
Oval Butterflyfish
2,121 records
Whitespotted Butterflyfish
2,050 records
Chevroned Butterflyfish
1,895 records
Record pattern: repeated
Repeated records across many years and months. This is inferred from how many years and months the animal appears in, not from a range map — treat it as evidence, not a formal assessment.
Repeated records across many years and months. This is inferred from how many years and months the animal appears in, not from a range map — treat it as evidence, not a formal assessment.