Arripis georgianus
Tommy rough | Arripis georgiana
Distribution
Temperate Australasia
Description
Similar body shape to juvenile Australian salmon, but with obvious black markings on the tips of the tail. The species occurs in large schools in sheltered bays, migrating as the fish mature in February and March to spawning grounds at the southwest corner of Western Australia.
Information
Max Size: 41 cm
Sea Temperature Range: 13.3-23.3°C
Depth: 0-30m
Habitat Generalization Index: 2.41
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: Common (22.0% 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: Large aggregations (113 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