11004-05402 Southern flathead galaxias (Galaxias 'southern') have populations in the Waiau, Aparima, Mataura and Oreti rivers. Some populations are found on Stewart Island/Rakiura, and are thought to have distributed there during the Pleistocene when a land-bridge was present. While galaxiids today are usually found high up in headwater streams where predators cannot reach them, southern flatheads buck the trend. They are more generally found in the mid-to-lower reaches of gravel- and cobble-laden streams and rivers. They are classified as 'at risk' because of declining populations, occupying an area of only 97.1 hectares. Nokomai River *
11004-05420 Southern flathead galaxias (Galaxias 'southern') have populations in the Waiau, Aparima, Mataura and Oreti rivers. Some populations are found on Stewart Island/Rakiura, and are thought to have distributed there during the Pleistocene when a land-bridge was present. While galaxiids today are usually found high up in headwater streams where predators cannot reach them, southern flatheads buck the trend. They are more generally found in the mid-to-lower reaches of gravel- and cobble-laden streams and rivers. They are classified as 'at risk' because of declining populations, occupying an area of only 97.1 hectares. Nokomai River *
DSC_0905 Teviot flathead galaxias (Galaxias 'Teviot') one of 12 species of endemic, non-migratory galaxiids from southern New Zealand. Over the last decade, nearly half the known Teviot populations have been lost. This can be directly linked to the spread of sports fish (trout and brook char), which eat galaxiids; and changes in land use such as stock access to streams, reduction of native vegetation, land development and forest harvesting. They are classified Nationally critical, now occupying an area of only 0.5 hectares. The last few populations remain in a few headwater streams small enough to step across in the Teviot River, surrounding Lake Onslow *
