overview
who is the creole perch
The main native predator of Patagonian lakes and rivers, ahead of the arrival of trout. It lives in Andean lakes, reservoirs and lowland rivers of Argentina (Colorado, Negro, Limay and Chubut river basins) and southern Chile. It eats small crustaceans (such as freshwater crabs of the genus Aegla), insects and fish. There are big-mouthed and small-mouthed forms, which anglers call bocona and boca chica. It shares habitat with introduced trout and salmon, which compete with it for food and shelter. For anglers it is a summer fish: it takes small lures well near rocks, reeds and banks. Because it is native, release is mandatory in several habitats.
fun facts
- Genetic studies link differences in body shape between populations to natural selection and to glacial cycles that isolated lakes on both sides of the Andes.
- It is the native perch of Patagonia: it has nothing to do with European perches, despite the name.
how to recognize it
identification
Tall, compressed body, olive to bronze with irregular dark blotches and bars and a pale belly. Two dorsal fins joined at the base, the first with strong spines; rough scales and a spiny gill cover. No adipose fin, which sets it apart from trout and salmon at a glance. Mouth varies from large to small depending on the form.
how creole perch fishing looks
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