Bicolor Slickhead

Alepocephalus bicolor

Fish
IUCN: Not evaluated

Usual depth305–635 m
Water temperature25–30 °C
Best monthsFebruary, March, and April
How commonRare

All species

Where and when

Where it has been recorded

Worldwide

Loading the map

Best months

Worldwide (open data)

January: 1 records
February: 9 records
March: 7 records
April: 9 records
May: 0 records
June: 0 records
July: 3 records
August: 1 records
September: 2 records
October: 0 records
November: 4 records
December: 4 records

Depth and water temperature

Depth

Mostly recorded at 305–635 m · Deepest record: 1,135 m

210–220 m: 1 records
220–230 m: 0 records
230–240 m: 0 records
240–250 m: 0 records
250–260 m: 0 records
260–270 m: 0 records
270–280 m: 0 records
280–290 m: 0 records
290–300 m: 0 records
300–310 m: 7 records
310–320 m: 0 records
320+ m: 27 records

Water temperature

Recorded in surface water of 25–30 °C

24–26 °C: 4 records
26–28 °C: 12 records
28–30 °C: 32 records

Names and classification

English: Bicolor Slickhead

Names in 2 more languages

Japanese: Hosomekon-nyakuiwashi, ホソメコンニャクイワシ
Simplified Chinese: 雙色平頭魚, 雙色黑頭魚, 黑頭魚

Similar species

Elongate Slickhead
Conocara microlepis

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).
134 open-data records from 1891 to 2025.
Species data updated October 26, 2026.

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