The present invention relates to a device for cleaning nets used for fish, which can be used to clean fish farming nets down to depths of 70 metres. The device includes: a structure comprising geometric sections for different components and mechanisms of the device； at least one base disposed on the structure； at least two ducted propellers, disposed in parts of the geometric sections of the structure； at least three high-pressure rotary cores； a plurality of rotary discs, each comprising at least three injectors that can withstand the high outlet pressures； and a plurality of tracks on at least four belts, for the movement of the device.
