Longsnout flathead

Thysanophrys chiltonae

Fish
IUCN: Least concern

Usual depth2–79 m
Water temperature23–30 °C
Best monthsApril, September, and October
How commonOccasional

Photo credit: (c) Ditch Townsend, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist

About this species

Thysanophrys is a genus of marine, demersal ray-finned fish belonging to the family Platycephalidae. These fishes are native to the Indian Ocean and the western Pacific Ocean.

Text from the Wikipedia article “Thysanophrys”, 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: 13 records
February: 11 records
March: 14 records
April: 39 records
May: 34 records
June: 13 records
July: 8 records
August: 18 records
September: 40 records
October: 38 records
November: 29 records
December: 9 records

Depth and water temperature

Depth

Mostly recorded at 2–79 m · Deepest record: 198 m

0–10 m: 48 records
10–20 m: 58 records
20–30 m: 31 records
30–40 m: 13 records
40–50 m: 1 records
50–60 m: 1 records
60–70 m: 1 records
70–80 m: 4 records
80–90 m: 2 records
90–100 m: 3 records
100–110 m: 1 records
110+ m: 11 records

Water temperature

Recorded in surface water of 23–30 °C

22–24 °C: 3 records
24–26 °C: 25 records
26–28 °C: 78 records
28–30 °C: 144 records
30–32 °C: 1 records

Photos

Names and classification

English: Longsnout flathead

Names in 2 more languages

French: Platycéphale clin d'œil
Japanese: Kuroshimagochi, クロシマゴチ

Other scientific names: Cociella chiltonae, Inegocia chiltonae, Platycephalus chiltonae, Thysanophrys chiltoni, Thysanophrys cluitouse

Similar species

Celebes Flathead
Thysanophrys celebica
Elates ransonnettii
Japanese Flathead
Inegocia japonica
Crocodile fish
Cymbacephalus beauforti
Black-freckled Flathead
Cymbacephalus nematophthalmus
Mud Flathead
Ambiserrula jugosa

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).
454 open-data records from 1908 to 2023.
Species data updated October 26, 2026.

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