Retropinna semoni (Weber, 1895)
Australian smelt
Retropinna semoni
photo by McDowall, R.M.

Family:  Retropinnidae (New Zealand smelts), subfamily: Retropinninae
Max. size:  10 cm TL (male/unsexed); max. reported age: 2 years
Environment:  pelagic; freshwater; brackish, potamodromous
Distribution:  Oceania: Australia's east coast from the Fritzroy River southward to at least the Shoalhaven River; throughout most of the Murray-Darling river system; and in Lake Eyre inland drainage system near Longreach, Thompson River.
Diagnosis:   
Biology:  Lives in streams, backwaters, lakes, swamps and estuaries. Occurs in brackish estuaries and inland salt lakes. Most common in slow-flowing streams and still waters, shoaling near the surface or around the cover of aquatic plants and woody debris. Forms large aggregations in open water (Ref. 44894). Feeds on aquatic insects, microcrustaceans and algae. Spawns throughout the Murray-Darling river system. Breeds between July and March (mostly in spring) (Ref. 44894). Spawning temperature is about 15 °C. Newly hatched larvae measure 4.8 mm TL on the average. Eggs are laid among aquatic vegetation and hatch in about 10 days. Sexual maturity is attained by the end of the first year (Ref. 44894). Eaten fresh or canned.
IUCN Red List Status: Least Concern (LC); Date assessed: 14 February 2019 Ref. (130435)
Threat to humans:  harmless


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