Home · Chaetodontidae · Atoll butterflyfish
Atoll butterflyfish (Chaetodon mertensii) — Chaetodontidae

Atoll butterflyfish

Chaetodon mertensii

The Atoll butterflyfish (Chaetodon mertensii) is a saltwater fish of the family Chaetodontidae that grows up to 13 cm.

Length
12.5 cm
Water
Saltwater
Depth
0.0–120.0 m
Activity
Diurnal
Body shape
Flat / disc-shaped
Substrate
Stone or rock
Danger
Harmless
Edibility
Commonly eaten

Description

The atoll butterflyfish is a butterflyfish (Chaetodontidae) from the Indo-Pacific. The species grows to about 13 cm and has a white body with fine, upward-pointing V-shaped lines (chevrons), a yellow to orange rear margin and a dark band through the eye. As a reef-dweller it lives on clear coral and rocky reefs and picks small invertebrates, coral polyps and algae. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Atoll butterflyfish?

The Atoll butterflyfish has a flattened, disc-shaped body and is mainly white.

Where does the Atoll butterflyfish live?

The Atoll butterflyfish lives in the sea (marine waters) and is mostly found around stony or rocky ground.

How big does the Atoll butterflyfish get?

The Atoll butterflyfish grows to a maximum of about 13 cm.

Is the Atoll butterflyfish dangerous to humans?

No, the Atoll butterflyfish is harmless to humans.

Is the Atoll butterflyfish edible?

Yes, the Atoll butterflyfish is commonly eaten.

Download Fin's Fish Guide

Identify fish in seconds, log your catches and dives. Join the TestFlight beta.

Get the beta →

All data

Identification

Dutch name
Atol-koraalvlinder sourced
English name
Atoll butterflyfish sourced
Scientific name
Chaetodon mertensii
Family
Chaetodontidae
Other names
Atoll butterflyfish; Keel-finned butterfly-fish; Merten's butterflyfish verified

Appearance

Size class
Small verified
Max length (cm)
12.5 verified
Body shape
Flat / disc-shaped sourced
Dominant colour
White sourced
Tail shape
Rounded inferred

Habitat & distribution

Water type
Saltwater sourced
Substrate
Stone or rock sourced
Min depth (m)
0.0 verified
Max depth (m)
120.0 verified
Origin
Native inferred

Behaviour & biology

Territorial
No inferred
Activity
Diurnal inferred
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred

For anglers

Edibility
Commonly eaten inferred
Fishing method
Klein van stuk en nauwelijks een hengelsportdoel; wordt vooral incidenteel of als aasvis gevangen. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

Same genus Chaetodon

More from the family Chaetodontidae

Download Fin's Fish Guide

Identify fish in seconds, log your catches and dives. Join the TestFlight beta.

Get the beta →