Cnidoglanis macrocephalus, New South Wales, Australia, Photo: Ian Shaw
Cnidoglanis macrocephalus, Western Australia,
Cnidoglanis macrocephalus, Jervis Bay, New South Wales, Australia, Photo: Rick Stuart-Smith
Temperate Australasia, Tropical Indo-Pacific
Mottled brown-yellow with eel tail, flattish head and numerous barbels around mouth. A related tropical species, the whitelip catfish Paraplotosusalbilabris, occurs with the estuary catfish on the southern west coast but can be recognised because it lacks a small tentacle at the back of the lip. The estuary catfish is attracted to sand where cover is provided by clumps of drift seagrass or kelp, and here remains concealed during the day.
Max Size: 91 cm
Sea Temperature Range: 15.1-24.6°C
Habitat: Rocky Reef, Seagrass, Soft sediment
Habitat Generalisation Index: 2.7
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
IUCN Threat Status: Data Deficient
Occurrence: Frequent (10% 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: Solitary (1 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