Petelinjsko Lake (Pivka intermittent lakes)
Petelinjsko is smaller than Palško (about 55 ha, 1 km long and 0.5 km wide) but holds water longer, sometimes half the year. It is fed from the Javorniki hills and from Palško through springs on its eastern side and drains through sinkholes towards the Pivka river; there are no underwater caves. At high water the rocky karst bed with field tracks lies up to about 10 m deep (the description cites 7 m in the middle), and visibility is much better than at Palško. Its special feature is a tiny crustacean that completes its life cycle within a month and multiplies to over a hundred per cubic metre, attracting flocks of water birds in winter.
Tiefe: 0–10 m