We have released 300 minnows in upper Suså on Maj 23rd. They all came from Funen. They have been released to prevent the extermination of the thick shelled river mussel. The minnow is a small cyprinidé. The mussels live on the bottom of the river. When the mussels are going to breed they release mussel larvas into the water and when the minnows breath under water, some of the larvas find some space in the gills of the fishes. After 3-4 weeks living in the gills the mussels have got nourishment from the minnow to produce a small mussel shell.