Yarra Pygmy Perch

Nannoperca obscura
Yarra Pygmy Perch - Marinewise © 2024 MarineWise

Quick Facts

Scientific name Nannoperca obscura
Family Temperate Bass / Percichthyidae
Size Up to 7.5 cm (2.95 in)
Weight A few grams

Distribution

Habitat & AU Distribution Freshwater streams, creeks, lakes & ponds amongst aquatic weeds & vegetation
Depth Range 0 - 1 m (3 ft)
Yarra Pygmy Perch Distribution

Interesting Info

  • The Yarra Pygmy Perch is a small freshwater fish species found in the Yarra River catchment in southeastern Australia.
  • It is one of Australia’s rarest freshwater fish, and is listed as a threatened species under the Victorian Flora and Fauna Guarantee Act 1988.
  • The species is typically found in slow-flowing or still sections of streams and rivers with gravel or sandy substrates.
  • They feed on a variety of aquatic invertebrates, including insect larvae and small crustaceans.
  • Yarra Pygmy Perch are sexually dimorphic, with males exhibiting brighter coloration and having larger pelvic fins than females.
  • Breeding typically occurs in the late winter and early spring, with females laying adhesive eggs in shallow water.
  • They are often preyed upon by larger fish, such as introduced trout species, as well as birds and other predators.
  • The species has a relatively short lifespan, with individuals typically living for only 2-3 years.
Species Interaction

Minimal Species Contact

Engagement with Yarra Pygmy Perch are largely focused on conservation and protection of the species due to their threatened status.

Scientific Classification

Kingdom: Animalia

Phylum: Chordata

Class: Actinopterygii

Order: Perciformes

Family: Percichthyidae

Genus: Nannoperca

Species: Nannoperca obscura

Conservation Status

The Yarra Pygmy Perch is listed as a threatened species under the Victorian Flora and Fauna Guarantee Act 1988, and is also listed as endangered under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999. The species is one of Australia’s rarest freshwater fish, and its distribution is limited to the Yarra River catchment in southeastern Australia.

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