Ptereleotris monoptera

Lyre-tail dart-goby | Lyretail Goby | Monofin Dartfish
Ptereleotris monoptera
Ptereleotris monoptera, NSW, Australia, Photo: Ian Shaw
Ptereleotris monoptera
Ptereleotris monoptera, NSW, Australia, Photo: John Turnbull
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Ptereleotris monoptera
Ptereleotris monoptera


Temperate Australasia, Tropical Indo-Pacific


Pale body, with yellow/red margin of dorsal fin and diffuse dark bar under eye to snout. Similar P. microlepis (greeneye dartgoby) has small black bar on pectoral fin base.


Max Size: 12 cm

Sea Temperature Range: 15.3-29.6°C

Depth: 6-50m

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 (4.6% 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 (14 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