Flap-gilled Dragonet
Eleutherochir opercularis
- Usual depth1–5 m
- Water temperature24–29 °C
- Best monthsApril
- How commonRare
About this species
Eleutherochir is a monotypic genus of dragonets native to the Indian Ocean and the western Pacific Ocean.
Text from the Wikipedia article “Eleutherochir”, licensed CC BY-SA 4.0. Read the article
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 2 records
- February: 0 records
- March: 0 records
- April: 17 records
- May: 1 records
- June: 3 records
- July: 1 records
- August: 0 records
- September: 0 records
- October: 0 records
- November: 0 records
- December: 3 records
Depth and water temperature
Depth
Mostly recorded at 1–5 m · Deepest record: 5 m
Water temperature
Recorded in surface water of 24–29 °C
Names and classification
- English
- Flap-gilled Dragonet
Names in 2 more languages
- Japanese
- Okuchinumeri, オオクチヌメリ, クシヒゲヌメリ
- Simplified Chinese
- 狗圻, 老鼠, 雙鰭喉褶
Other scientific names: Callionymus opercularis, Eleutherochir mccaddeni, Pogonymus goslinei
Similar species
Finger DragonetDactylopus dactylopus
Green mandarinSynchiropus splendidus
- Common Dragonet
Callionymus enneactis
- Blotchfin dragonet
Callionymus filamentosus
Leafy DragonetAnaora tentaculata
Sidespotted DragonetCallionymus pleurostictus
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).
- 47 open-data records from 1837 to 2023.
- Species data updated October 26, 2026.
Log what you see on your next dive
The free DiveHive diver app keeps your logbook with every sighting and shows what lives at the site you dive next.