Fat greenling

Hexagrammos otakii

Fish
IUCN: Least concern

Usual depth0–33 m
Water temperature8–20 °C
Best monthsApril, June, and July
How commonOccasional

All species

Photo credit: (c) harum.koh, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist

Where and when

Where it has been recorded

Worldwide

Loading the map

Best months

Worldwide (open data)

January: 3 records
February: 1 records
March: 6 records
April: 23 records
May: 21 records
June: 22 records
July: 22 records
August: 20 records
September: 13 records
October: 17 records
November: 11 records
December: 4 records

Depth and water temperature

Depth

Mostly recorded at 0–33 m · Deepest record: 76.4 m

0–10 m: 74 records
10–20 m: 19 records
20–30 m: 17 records
30–40 m: 13 records
40–50 m: 0 records
50–60 m: 0 records
60–70 m: 2 records
70–80 m: 3 records

Water temperature

Recorded in surface water of 8–20 °C

8–10 °C: 2 records
10–12 °C: 1 records
12–14 °C: 17 records
14–16 °C: 16 records
16–18 °C: 4 records
18–20 °C: 188 records
20–22 °C: 2 records

Photos

Names and classification

English: Fat greenling, Rock trout, Otaki’s Greenling

Names in 2 more languages

Japanese: Ainame, アイナメ
Korean: 쥐노래미

Other scientific names: Hexagrammos aburaco, Hexagrammos pingi

Similar species

Spotty-Bellied Greenling
Hexagrammos agrammus

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).
288 open-data records from 1895 to 2021.
Species data updated November 3, 2026.

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