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| | Treasures of Latvian Nature |
 | | The Salaca River (length, 95 km; confluence basin, 3,420 square kilometers) is the largest spawning ground for salmon in the eastern Baltics. |
 | | The requirements for the river pearls habitat are highly specific - small, oligotrophic rivers with cold, swiftly flowing water, a sandy river bed free of sludge and algae, and forested coasts. |
 | | It is known to exist in only one location on the banks of the River Venta, where the river makes a sharp curve and where the river bank is steep, slippery, and fed by springs; this is the restricted nature area of Piesdanga. |
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