Self-calibrating ultrasonic removal of ectoparasites from fish

A computer-implemented method, comprising:

• obtaining an image of a sea louse on a fish in a sea lice treatment station;
• determining, from the image, a location of the sea louse in the sea lice treatment station;
• accessing propagation parameters of the sea lice treatment station from storage of the sea lice treatment station;
• and
• generating, by ultrasonic transducers of the sea lice treatment station and based on the propagation parameters and the location of the sea louse in the sea lice treatment station, a third set of ultrasonic signals that focuses energy at the sea louse.

A non-transitory computer storage medium encoded with instructions that, when executed by one or more computers, cause the one or more computers to perform operations comprising:

• generating, by ultrasonic transducers distributed in a sea lice treatment station, a first set of ultrasonic signals;
• detecting, by the ultrasonic transducers, a second set of ultrasonic signals in response to propagation of the first set of ultrasonic signals through water in the sea lice treatment station;
• determining propagation parameters of the sea lice treatment station based on the second set of ultrasonic signals that were detected;
• storing the propagation parameters for later treatment of sea lice;
• and
• using the stored propagation parameters to generate a set of ultrasonic signals that focus energy at a sea louse.

A non-transitory computer storage medium encoded with instructions that, when executed by one or more computers, cause the one or more computers to perform operations comprising:

• obtaining an image of a sea louse on a fish in a sea lice treatment station;
• determining, from the image, a location of the sea louse in the sea lice treatment station;
• accessing propagation parameters of the sea lice treatment station from storage of the sea lice treatment station;
• and
• generating, by ultrasonic transducers of the sea lice treatment station and based on the propagation parameters and the location of the sea louse in the sea lice treatment station, a third set of ultrasonic signals that focuses energy at the sea louse.