COMBATING FREE SWIMMING LICE AND OTHER ECTOPARASITES IN THE WATER OF A FISH FARM

摘要

Device (10) and method for combating free swimming lice and other ectoparasites in the water of a fish farm, wherein the free swimming lice and other ectoparasites are attracted by using at least one light source (30) and combating the attracted free swimming lice and other ectoparasites by ultrasonic means. The device (10) comprises an upper disc (11) and a lower disc (12), the light source (30) extending between said discs (11, 12). Ultrasound units (20a, 20b) are arranged to the discs (11, 12) and emit ultrasound signals towards the respective facing disc (11, 12).