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.

The present invention relates to an underwater harvesting system (1) for harvesting zooplankton or mesoplagic fishes, comprising an underwater vehicle (2) for being lowered into the sea and towed behind a surface vessel (3), comprising a housing (21) provided with an inlet (22) through which zooplankton-containing-fluid may flow; a hose (4) mounted on the underwater vehicle and in fluid communication with the inlet, the hose being adapted to secure and fluidly connect the underwater vehicle to the surface vessel; and pumping means for drawing in a zooplankton-containing-fluid through the inlet in the underwater vehicle and for pumping the zooplankton-containing-fluid through the hose to the surface vessel. The invention further relates to a method for harvesting zooplankton or other marine organisms.

Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for underwater feed movement detection. In one aspect, the method may include the actions of obtaining images captured at different time points, where the images are captured by a camera and indicate feed that has been dispersed by a feeder for aquatic livestock inside an enclosure; determining, for each image, respective locations of the feed indicated by the image; determining, from the respective locations of the feed, a respective movement of the feed over the different time points; determining, based on the respective feed movement of the feed over the different time points, water current movement within the enclosure for the aquatic livestock; and outputting an indication of the water current movement.

A fish pumping system for moving upload water and fish includes a buffer pipe section having an upstream end and a downstream end. An inlet valve assembly is at the upstream end and provides fluid communication between the buffer pipe and an upstream fish origin. An outlet valve assembly is at the downstream end 5 and provides fluid communication between the buffer pipe and a fish destination. An inlet branch pipe is in fluid communication with the upstream end and an outlet branch pipe is in fluid communication with the downstream end. A production water piping circuit is in communication with the inlet branch pipe and the outlet branch pipe and forms a loop with the buffer pipe section. The 10 production water circuit pumps production water into the buffer pipe section through the inlet branch pipe and out from the buffer pipe section through the outlet branch pipe.

A fish pumping system for moving upload water and fish includes a buffer pipe section having an upstream end and a downstream end. An inlet valve assembly is at the upstream end and provides fluid communication between the buffer pipe and an upstream fish origin. An outlet valve assembly is at the downstream end 5 and provides fluid communication between the buffer pipe and a fish destination. An inlet branch pipe is in fluid communication with the upstream end and an outlet branch pipe is in fluid communication with the downstream end. A production water piping circuit is in communication with the inlet branch pipe and the outlet branch pipe and forms a loop with the buffer pipe section. The 10 production water circuit pumps production water into the buffer pipe section through the inlet branch pipe and out from the buffer pipe section through the outlet branch pipe.

In a device for repelling organisms causing human damage such as sharks, a tubular member made of a viscoelastic material and a part of the tubular member are provided. A voltage is applied between the built-in power supply device, electrodes provided on a part or all of the outer surface of the tubular member, a string-shaped member having a counter electrode extending from the tubular member, and the electrodes. A switch that turns on and off the energization from the power supply device for power supply, and a joint member that connects the tubular members in a ring shape, and by putting them in water and applying a voltage between the electrodes, sharks that live in water, etc.

A curtain of a boom for harvesting brine shrimp eggs includes mesh sections for directing a flow of water in a first direction such that an amount of the brine shrimp eggs swept under the curtain of the boom during a harvesting process is minimized and a bottom section located below the mesh sections for directing a flow of water in a second direction during the harvesting process such that debris in the water is swept under the curtain of the boom.

A curtain of a boom for harvesting brine shrimp eggs includes mesh sections for directing a flow of water in a first direction such that an amount of the brine shrimp eggs swept under the curtain of the boom during a harvesting process is minimized and a bottom section located below the mesh sections for directing a flow of water in a second direction during the harvesting process such that debris in the water is swept under the curtain of the boom.

A line management system for an outrigger structure is provided for guiding outrigger cords through cord passages to maintain an independent longitudinal displacement in order to prevent entanglement. The system includes a plurality of outrigger cords, cord management units, and retention devices. The plurality of cord management units are coupled to the outrigger structure and are longitudinally spaced one from the other along the outrigger structure. Each of the cord management units defines a plurality of transversely offset cord passages respectively guiding predetermined ones of outrigger cords to maintain an independent longitudinal displacement relative to the outrigger structure.

Apparatuses, methods, and systems are provided for making the harvesting of sea life efficient. For example, real-time or periodic information about the status of the many traps a fisherman may have set is communicated to the fisherman while the traps are still in the water. A fisherman can use this information to determine the best time and path for trap retrieval and reset operations to reduce fuel use and improve the catch efficiency per unit effort.