Brachaluteres jacksonianus

Monacanthidae
Pygmy Leatherjacket
  • Brachaluteres jacksonianus, Adult. Photo: Rick Stuart-Smith
    Brachaluteres jacksonianus, Adult. Photo: Rick Stuart-Smith
  • Brachaluteres jacksonianus, Port Stephens, NSW, Photo: Ian Shaw
    Brachaluteres jacksonianus, Port Stephens, NSW, Photo: Ian Shaw
  • Brachaluteres jacksonianus, Juvenile. Photo: Rick Stuart-Smith
    Brachaluteres jacksonianus, Juvenile. Photo: Rick Stuart-Smith
  • Brachaluteres jacksonianus, Port Stephens, NSW, Photo: Ian Shaw
    Brachaluteres jacksonianus, Port Stephens, NSW, Photo: Ian Shaw
  • Brachaluteres jacksonianus, Adult, Jervis Bay, NSW, Photo: Andrew Green
    Brachaluteres jacksonianus, Adult, Jervis Bay, NSW, Photo: Andrew Green
  • Brachaluteres jacksonianus, Narooma, NSW, Photo: Andrew Green
    Brachaluteres jacksonianus, Narooma, NSW, Photo: Andrew Green
  • Brachaluteres jacksonianus, Narooma, NSW, Photo: Andrew Green
    Brachaluteres jacksonianus, Narooma, NSW, Photo: Andrew Green
Distribution
Temperate Australasia
Description
Small size and rounded shape. It is also unusual in that the dorsal spine lacks a secondary locking spine and can therefore be easily depressed. Southern pygmy leatherjackets are common in all southern states in seagrass and brown algal habitats. At night they often sleep while attached by mouth to seaweed fronds.
Information
  • Max Size: 10 cm
  • Sea Temperature Range: 11.5-24.6°C
  • Depth: 0-25m
  • Habitat: Rocky Reef, Seagrass
  • Habitat Generalisation Index: 5.2
    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
Rarity
  • IUCN Threat Status: Not Evaluated
  • Occurrence: Frequent (18% 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 (2 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
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