The Salt River aka Soutrivier of the Garden Route arises in the Tsitsikamma Mountains between Knysna and Port Elizabeth in South Africa, and mouths into the Indian Ocean just west of Nature's Valley.

[1] In the year 2000 the Albany Museum based in Grahamstown initiated surveys to determine which aquatic macroinvertebrates lived in the Salt River.

Some 13 undescribed species of macroinvertebrate fauna collected by researchers proved to be of great interest, ending plans for introducing trout.

Eleven of the Tsitsikamma rivers were selected for closer study and were found to harbour a rich diversity of aquatic insects, many of which are regionally endemic species.

"These fynbos covered sandstone mountains with their numerous gorges determine the nature of the rivers which are cold, fast-flowing, well oxygenated waters with little sediment.