Iodine Bream

Gymnocranius euanus

Fish
IUCN: Least concern

Usual depth4–90 m
Water temperature22–29 °C
Best monthsMay, August, and September
How commonOccasional

About this species

Gymnocranius euanus, the Japanese large-eye bream, Japanese sea bream, paddletail bream, speckled emperor or iodine bream, is a species of marine ray-finned fish belonging to the family Lethrinidae, the emperors and emperor breams. This fish is found in the Western Pacific Ocean.

Text from the Wikipedia article “Gymnocranius euanus”, 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: 3 records
February: 3 records
March: 4 records
April: 1 records
May: 101 records
June: 10 records
July: 30 records
August: 63 records
September: 62 records
October: 19 records
November: 8 records
December: 11 records

Depth and water temperature

Depth

Mostly recorded at 4–90 m · Deepest record: 147 m

0–10 m: 66 records
10–20 m: 3 records
20–30 m: 3 records
30–40 m: 3 records
40–50 m: 3 records
50–60 m: 2 records
60–70 m: 3 records
70–80 m: 41 records
80–90 m: 104 records
90–100 m: 48 records
100–110 m: 0 records
110+ m: 3 records

Water temperature

Recorded in surface water of 22–29 °C

20–22 °C: 2 records
22–24 °C: 12 records
24–26 °C: 240 records
26–28 °C: 61 records
28–30 °C: 4 records

Names and classification

English: Iodine Bream, Japanese large-eye bream, Japanese sea bream, Paddle-tailed Sea-bream, Paddletail Seabream

Names in 4 more languages

Filipino: Kulapo
French: Bossu blanc à points noirs
Japanese: Shirodai, シロダイ
Simplified Chinese: 真白鱲, 真裸頂鯛, 真裸顶鲷, 龍尖

Other scientific names: Gymnocranius japonicus, Monotaxis affinis, Sphaerodon euanus

Similar species

Blue-lined large-eye bream
Gymnocranius grandoculis
Grey large-eye bream
Gymnocranius griseus
Bastard Bream
Gymnocranius audleyi
Forktail large-eye bream
Gymnocranius elongatus
blue-spotted large-eye bream
Gymnocranius microdon
Blacknape Large-eye Bream
Gymnocranius satoi

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).
415 open-data records from 1976 to 2022.
Species data updated November 3, 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.

Join the waitlist