The sparse fauna before the dredging of the lake, after 1995 evolved into a pretty considerable variety of species typical for shallow lakes rich in nutrients. Two species of freshwater snails, "Bithynia leachii" and "Gyraulus crista", were earlier considered as endangered. Noteworthy is also the population of several freshwater mussels, duck mussel and swan mussel, and "Hippeutis complanatus", the latter two declining. A species of Oligochaeta new in Sweden has been reported in the lake just like did the rare hairy dragonfly. An inventory of dragonfly larvae in 2000 unveiled several other species (mostly red-eyed damselfly but also common blue damselfly, azure damselfly, variable damselfly, and northern damselfly ("Coenagrion hastulatum"). Fish population reflects the shortage of oxygen with an absence of carp bream and silver bream and an abundance of perch, roach, and crucian carp dating back to before the dredging. The outlet forms a threshold for migrating species.