Signigobius biocellatus

Crab-eye Goby | Four-eyed Goby | Signal Goby | Twinspot Goby
Signigobius biocellatus
Signigobius biocellatus, Raja Ampat, Indonesia, Photo: Andrew Green
Signigobius biocellatus
Signigobius biocellatus, North WA, Australia, Photo: Andrew Green
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Signigobius biocellatus
Signigobius biocellatus


Tropical Indo-Pacific


Pale body with brown blotches, distinct large, yellow-ringed ocelli on each dorsal fin, narrow brown bar through eye, large black, blue-spotted pelvic and anal fins. Double-ended appearance and frequently moves in either direction. Often in pairs, hovering low down over the sand signalling to each other with their eye-spots.


Max Size: 10 cm

Sea Temperature Range: 23.5-31.1°C

Depth: 1-30 m

Habitat Generalization Index: 1.02

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: Frequent (10.1% 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