Atherinason hepsetoides

Deepwater hardyhead
Atherinason hepsetoides
Atherinason hepsetoides, Bicheno, TAS, Photo: Graham Edgar


Temperate Australasia


Large number of scales along the back. It also differs in behaviour from other species as it lives in depths to 30 m during the day, moving up into the shallows to feed at night.


Max Size: 9 cm

Sea Temperature Range: 12.1-20.2°C

Depth: 0-30m

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 (1.7% 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: Large aggregations (312 per transect)

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

Edit by: GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney