Estuary perch
(Percalates colonorum)

General data

Scientific names: Estuary perch
Habitat: Catadromous
Climate: Temperate
Distribution: Murray River, Pacific Ocean

The estuary perch (Macquaria colonorum) is a species of temperate perch endemic to south-eastern Australia, where it prefers brackish waters such as lower tidal reaches of coastal lakes, rivers, and streams.

Appearance
It is very similar to and very closely related to its sister species, the Australian bass, Macquaria novemaculeata, differing in having a slightly more scooped forehead and reaching a larger length of 75 cm (30 in). Most individuals only reach around 40 cm (16 in).