Methods, systems, and apparatus, including computer programs encoded on a computer storage medium that automatically performs actions in an aquaculture environment based on light sensed by underwater cameras. One of the methods includes obtaining images of a surface of water captured by a camera that faces upwards from a depth towards the surface of the water within an enclosure that encloses aquatic livestock. An ambient light metric is determined at the depth from the images of the surface of the water. A determination is made as to whether the camera satisfies one or more depth criteria. Based on determining that the depth of the camera satisfies the one or more depth criteria, it is determined that, based on the ambient light metric at the depth, one or more action criteria are satisfied, then initiating performance of an action to be performed for the aquatic livestock.

The invention relates to the use of sonar acoustic pulses to provide information about the status and composition of aquaculture farming tanks or ponds. In particular, the invention is directed to processes and systems comprising: a acoustic pulse transducer configured to transmit a acoustic pulse into an aquaculture farming tank or pond, a network of underwater sonar signal receivers; a computer connected to the network of underwater sonar signal receivers, said computer having a processor and memory, said memory having computer programming instructions saved thereon and executable on the processor, said computer programming instructions configured for receiving and comparing a signal difference between the acoustic pulse and the scattered return signal and for using the signal difference to output a signal difference data point related to a calculated shrimp biomass and distribution in the aquaculture farming tank or pond; a computer display connected to the computer and configured to display the signal difference data point related the calculated shrimp biomass and distribution.

The invention relates to the use of sonar acoustic pulses to provide information about the status and composition of aquaculture farming tanks or ponds. In particular, the invention is directed to processes and systems comprising: a acoustic pulse transducer configured to transmit a acoustic pulse into an aquaculture farming tank or pond, a network of underwater sonar signal receivers; a computer connected to the network of underwater sonar signal receivers, said computer having a processor and memory, said memory having computer programming instructions saved thereon and executable on the processor, said computer programming instructions configured for receiving and comparing a signal difference between the acoustic pulse and the scattered return signal and for using the signal difference to output a signal difference data point related to a calculated shrimp biomass and distribution in the aquaculture farming tank or pond; a computer display connected to the computer and configured to display the signal difference data point related the calculated shrimp biomass and distribution.

In one aspect, there is provided a marine sensor platform that includes: a line having a plurality of slots that are spaced apart on the line, a plurality of sensor nodes, each sensor node configured to couple to each of the slots on the line, and each sensor node including at least one sensor, a power source coupled to the plurality of sensor nodes and configured to supply power to the plurality of sensor nodes on the line, and a controller coupled to the power source and the plurality of sensor nodes on the line, wherein the controller is configured to identify a type of the at least one sensor included in each of the sensor nodes when each of the sensor nodes is coupled to the respective slot on the line.

The present invention is a fish passage system for use at dams. It may incorporate one or more reversible pump-turbines for controlling and generating power from downstream flow of water and fish and for pumping water and fish upstream. For low head embodiments the system may use water stored at above headwater elevation in lieu of a reversible pump turbine for moving fish and water from tailwater to headwater.

A harvesting unit with one or more pumps including one or more suction nozzles directed towards the seabed, one or more inlets that lead from the suction nozzle to the pump, an outlet to a sorting device, one or more motors for driving the one or more pumps, where the sorting device, which at least separates bottom-dwelling marine organisms from bycatch and foreign bodies, has an outlet for bottom-dwelling marine organisms leading to a collecting unit, a structural main frame that carries at least the harvesting unit, and a towing and launching system for deployment and propulsion of the harvesting unit.

A crustacean trap adapted to permit blocking entry to a crustacean of a protected species, including a cage, enclosing a volume and a crustacean entrance that can be closed to prevent entry, responsive to a first signal and opened to permit crustacean entry, responsive to a second signal received at the trap. Also, an image forming assembly includes a digital camera and a flash mechanism, the assembly being directed at an area immediately outside of the entrance and being tuned to return a maximum signal from crustaceans of the protected crustacean species so that a protected species crustacean appears as brightly lit in images formed, and being communicatively connected to a remote station that is equipped to receive-images from the assembly. Finally, there is a connector for connecting the cage to a signal source for receiving the first and second signals and for sending the images formed.

A crustacean trap adapted to permit blocking entry to a crustacean of a protected species, including a cage, enclosing a volume and a crustacean entrance that can be closed to prevent entry, responsive to a first signal and opened to permit crustacean entry, responsive to a second signal received at the trap. Also, an image forming assembly includes a digital camera and a flash mechanism, the assembly being directed at an area immediately outside of the entrance and being tuned to return a maximum signal from crustaceans of the protected crustacean species so that a protected species crustacean appears as brightly lit in images formed, and being communicatively connected to a remote station that is equipped to receive-images from the assembly. Finally, there is a connector for connecting the cage to a signal source for receiving the first and second signals and for sending the images formed.

The present invention relates to a method, a system and an apparatus for treating food items. Such method and device may, for instance, be used to cool down food items, bleed freshly slaughtered fish and treat live fish against parasites. The device and method of the present invention further uses temperature differences and agitation to tread food items. A method for reducing or eliminating sea lice from salmon fish, said method comprising: a) transporting the salmon fish from a reservoir and the feeding salmon fish in liquid into the tubing of a first pumping device, said liquid being at a temperature from +15 to +28° C., b) transporting the salmon fish in liquid through the tubing of the pumping device at a first set time period for treatment in said liquid, c) feeding the salmon fish out of the first pumping device, d) separating the liquid from the salmon fish, and e) transporting the salmon fish back to the reservoir, wherein the liquid media from the pumping device is redirected after separation from the salmon fish in step d) through a heat exchange element back into the pumping device for continued treatment of further salmon fish, and wherein the temperature difference between the liquid used in steps b) and the reservoir is more than 15° C.

A submersible (10) and method of using a submersible for capturing a target species comprising: at least one controllable thruster (14) for manoeuvring the submersible; at least one camera (12) for capturing images to allow the identification of an individual of a target species; a catapult mechanism (33) wherein the catapult mechanism is reversibly moveable between a released configuration and a primed configuration by an activatable motor, and wherein the catapult mechanism may be loaded with a retractable device mounted on the catapult mechanism, and the retractable device may be launched from the submersible by being propelled by the catapult mechanism; a container for receiving a captured individual.