Gymnocranius euanus

Japanese large-eye bream | Japanese Sea Bream | Paddletail Seabream | Speckled Emperor
Gymnocranius euanus
Gymnocranius euanus, Photo: Rick Stuart-Smith
Gymnocranius euanus
Gymnocranius euanus, Frederick Reef, Coral Sea, Photo: Graham Edgar
Gymnocranius euanus
Gymnocranius euanus, Marion Reef, Coral Sea, Photo: Ian Shaw
Gymnocranius euanus
Gymnocranius euanus, NSW, Australia, Photo: Ian Shaw
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Gymnocranius euanus
Gymnocranius euanus
Gymnocranius euanus
Gymnocranius euanus


Tropical Indo-Pacific


Silver-grey body with scattered black spots on sides, high body profile with steeply-sloping head, and large tail with rounded lobes.


Max Size: 45 cm

Sea Temperature Range: 19.8-29.4°C

Depth: 15-50m

Habitat Generalization Index: 2.07

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Not Evaluated

Occurrence: Infrequent (8.0% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Few (3 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: RD Stuart-Smith, GJ Edgar, AJ Green, IV Shaw. 2015. Tropical Marine Fishes of Australia. Reed New Holland