Gammarus lacustris from Lej da San Murezzan. A typical freshwater amphipod found in lakes.Location where Gammarus lacustris was found at Lej da San Murezzan.A stream in the Lucerne region: the typical habitat of amphipods, such as the stream amphipod Gammarus fossarum.Niphargus puteanus from the Schaffhausen region. As this genus inhabits subterranean habitats, it lacks eyes and pigmentation.A cave in the Basel region as a typical habitat for Niphargus.