Eustomias inconstans

Fish
IUCN: Data deficient

Usual depth68–770 m
Water temperature26–27 °C
Best monthsFebruary
How commonRare

All species

Where and when

Where it has been recorded

Worldwide

Loading the map

Best months

Worldwide (open data)

January: 0 records
February: 5 records
March: 2 records
April: 0 records
May: 0 records
June: 0 records
July: 1 records
August: 2 records
September: 1 records
October: 2 records
November: 0 records
December: 0 records

Depth and water temperature

Depth

Mostly recorded at 68–770 m · Deepest record: 800 m

60–70 m: 2 records
70–80 m: 0 records
80–90 m: 0 records
90–100 m: 0 records
100–110 m: 0 records
110–120 m: 0 records
120–130 m: 0 records
130–140 m: 0 records
140–150 m: 0 records
150–160 m: 2 records
160–170 m: 0 records
170+ m: 9 records

Water temperature

Recorded in surface water of 26–27 °C

24–26 °C: 10 records
26–28 °C: 3 records

Names and classification

Similar species

Eustomias albibulbus
Eustomias appositus
Eustomias bibulboides
Twinthread Dragonfish
Eustomias bifilis
Bigelow's Dragonfish
Eustomias bigelowi
Polynesian Dragonfish
Eustomias bimargaritoides

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.
Conservation status as published by GBIF (IUCN Red List).
14 open-data records from 1956 to 1978.
Species data updated November 2, 2026.

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