Priacanthus blochii

Glasseye | Bloch's Bigeye | Paeony Bullseye | Shortfin Bigeye | Silver Big-eye
Priacanthus blochii
Priacanthus blochii, Dampier, Western Australia, Photo: Graham Edgar
Priacanthus blochii
Priacanthus blochii, Raja Ampat, Indonesia, Photo: Graham Edgar
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Priacanthus blochii
Priacanthus blochii


Tropical Indo-Pacific


Variable colouration from plain red-brown to silvery, with the ability to rapidly fade or darken in to diffuse blotchy bars on body, though always with a red patch below eye. Rear fins lacking spots, tailfin margin slightly rounded or straight. Indistinct black spot at base of pelvic fin (not visible in photo), like in P. hamrur (Lunartail Bigeye), but has flatter tail margin. Similar P. macracanthus has numerous red spots on pelvic fin instead of single black spot near base.


Max Size: 35 cm

Sea Temperature Range: 23.1-32.5°C

Depth: 15-30m

Habitat Generalization Index: N/A

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 (1.3% 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: Many (13 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