Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for self-calibrating ultrasonic removal of sea lice. In some implementations, a method includes generating, by transducers distributed in a sea lice treatment station, a first set of ultrasonic signals, detecting a second set of ultrasonic signals in response to propagation of the first set of ultrasonic signals through water, determining propagation parameters of the sea lice treatment station based on the second set of ultrasonic signals that were detected, obtaining an image of a sea louse on a fish in the sea lice treatment station, determining, from the image, a location of the sea louse in the sea lice treatment station, and generating a third set of ultrasonic signals that focuses energy at the sea louse.

The invention relates to a submerged observation unit (6) for a fish tank, wherein the observation unit (6) is suspended in a node cable (5) from a hoist winch (3) of a surface buoy (2). The node cable (5) is torsion-resistant, wherein the node cable (5) is at its upper end wound on the hoist winch (3) having a horizontal drum axis. The observation unit (6) is arranged to be motorized and to azimuthally rotate about a vertical axis. The surface buoy (2) is arranged to be motorized and to move along a main span (10) of a surface cable (1), wherein the main span (10) is arranged to be spanned across a float ring (9) of the fish tank.

A method for external fish parasite monitoring in aquaculture, comprising the steps of: —submerging a camera (52) in a sea pen containing fish, the camera having a field of view; —capturing images of the fish with the camera (52); and—identifying external fish parasite on the fish by analyzing the captured images, characterized in that a target region within the field of view of the camera (52) is illuminated from above and below with light of different intensities and/or spectral compositions.

A method for external fish parasite monitoring in aquaculture, comprising the steps of: —submerging a camera (52) in a sea pen containing fish, the camera having a field of view; —capturing images of the fish with the camera (52); and—identifying external fish parasite on the fish by analyzing the captured images, characterized in that a target region within the field of view of the camera (52) is illuminated from above and below with light of different intensities and/or spectral compositions.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, that control devices in an aquaculture environment. One of the methods includes determining a particular objective for a robot that is operating in an aquaculture environment and determining one or more sensed conditions that are associated with the aquaculture environment. The particular objective is provided to an anti-fish-startling model evaluation engine that is configured to output actions, for a given objective, that accomplish the given objective while reducing a startling effect on nearby fish. Based on providing the particular objective to the anti-fish-startling model evaluation engine, one or more particular actions for accomplishing the particular objective are determined. The one or more particular actions are transmitted to another device.

The present invention relates to a method and a device for treating and/or transporting food items. The apparatus and method are designed to facilitate treating animals or food items in liquid. The device of the present invention is designed as a spiral pump with a tubing that is wound together with a rotating structure around a horizontal axis. The apparatus of the present invention and the use thereof provides a method to treat living or slaughtered animals or food items in a spiral pump.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, that validate the synchronization of controllers in an aquaculture environment. One of the methods includes an image processor that receives images generated by a first image generating device that includes a light filter that is associated with light of a particular light frequency while an aquaculture environment was illuminated with light. Based on the image that was generated by the first image generating device, the image processor determines whether the intensity value of the light frequency in the image satisfies a threshold value. Based on determining whether the intensity value of the light frequency in the image satisfies the threshold value, the image processor determines whether the aquaculture environment was illuminated with light of the particular light frequency when the image was generated. The image processor provides for output an indication of whether the aquaculture was illuminated with light of the particular frequency when the image was generated.

A floatable fish tank comprising: a hull having a lower part with side and bottom walls, the lower part forming an enclosure for fish; a deck arranged at an upper part of the hull; a central column fixed within the hull, wherein the central column is closed at its lower end section and extends from the bottom wall to the deck.

A floatable fish tank comprising: a hull having a lower part with side and bottom walls, the lower part forming an enclosure for fish; a deck arranged at an upper part of the hull; a central column fixed within the hull, wherein the central column is closed at its lower end section and extends from the bottom wall to the deck.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium that provides an enhanced synchronization framework. One of the methods includes a primary and a second device that receive configuration information which identifies one or more actions to be performed by the secondary device when it receives specified pulses of a sequence of pulses from the primary device. The primary device transmits a sequence of pulses. The primary and the secondary device receive a particular pulse from the sequence of pulses. The secondary device determines whether the particular pulse satisfies one or more predetermined criteria and generates an instruction based on the determination.