Concertina fish

Drepane longimana

Fish
IUCN: Not evaluated

Usual depth8–53 m
Water temperature17–30 °C
Best monthsMarch, September, and November
How commonRare

Photo credit: (c) Dr. Nasser Halaweh, some rights reserved (CC BY) · CC BY · iNaturalist

About this species

Drepane longimana, commonly known as the concertina fish, barred sicklefish, or banded sicklefish, is a fish native to the Indo-Pacific and northern Australia.

Text from the Wikipedia article “Drepane longimana”, licensed CC BY-SA 4.0. Read the article

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

January: 5 records
February: 5 records
March: 12 records
April: 12 records
May: 10 records
June: 7 records
July: 6 records
August: 11 records
September: 13 records
October: 11 records
November: 16 records
December: 6 records

Depth and water temperature

Depth

Mostly recorded at 8–53 m · Deepest record: 122 m

0–10 m: 6 records
10–20 m: 5 records
20–30 m: 21 records
30–40 m: 8 records
40–50 m: 2 records
50–60 m: 3 records
60–70 m: 1 records
70–80 m: 0 records
80–90 m: 0 records
90–100 m: 0 records
100–110 m: 0 records
110+ m: 1 records

Water temperature

Recorded in surface water of 17–30 °C

16–18 °C: 2 records
18–20 °C: 0 records
20–22 °C: 0 records
22–24 °C: 13 records
24–26 °C: 5 records
26–28 °C: 36 records
28–30 °C: 45 records

Photos

Names and classification

English: Concertina fish, Concertina fish, Sicklefish

Names in 1 more languages

Japanese: Sudaredai, スダレダイ

Other scientific names: Chaetodon longimanus, Drepane longimanus, Drepane longimata

Similar species

Spotted sicklefish
Drepane punctata

Sources and credits

Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).

Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
Conservation status as published by GBIF (IUCN Red List).
305 open-data records from 1909 to 2023.
Species data updated October 26, 2026.

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