Trachinops caudimaculatus

Hulafish
Trachinops caudimaculatus
Trachinops caudimaculatus0
Trachinops caudimaculatus
Trachinops caudimaculatus, Tasman Peninsula, TAS, Photo: Andrew Green
Trachinops caudimaculatus
Trachinops caudimaculatus, Port Arthur, TAS, Photo: Andrew Green
Trachinops caudimaculatus
Trachinops caudimaculatus, Maria Island, Tasmania, Photo: Graham Edgar
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Trachinops caudimaculatus
Trachinops caudimaculatus
Trachinops caudimaculatus
Trachinops caudimaculatus

Distribution

Temperate Australasia


Description

Base colouration can vary slightly, but slender body shape and tail distinctive. Black blotch in the centre of the tail, and outer margin of the tail with longer rays in the middle. Usually found in schools in locations less exposed to ocean swells.


Information

Max Size: 15 cm

Sea Temperature Range: 9.7-21.2°C

Depth: 1 - 35 m

Habitat Generalization Index: 12.37

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 (44.2% 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 (138 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