Yngen has a large number of fish species, including alpine bullhead, minnow and an abundant population of European perch.

The calcareous rock in the surroundings results in a high and stable pH value and a buffer capacity that resists acid deposition.

Getön, Älgön, Storön and Limön are of particular interest from a geological and botanical point of view.

The presence of limestone provides a rich flora on the islands, including nailwort, saxifraga adscendens, liverleaf, wood vetch, flat pea, maidenhair spleenwort, baneberry, and mezereum.

Here, minerals including silver, copper, lead, zinc, iron, and lime have been mined here.

European crayfish were previously abundant in the lake, but are now extinct due to a plague outbreak.

The table below shows the species of fish and crustaceans found in Yngen and the relative size of the population.

The Storforsälven river (Skärjbäcken) that drains the catchment area has tributary a order of 4, which means that the water flows through a total of four watercourses before reaching the sea after 349 kilometers.