The present invention is a hoop net comprised of netting mounted to two or more semicircular tubular rods, forming a ring that maintains its shape and structural integrity. The two semicircular tubular rods are fashioned to connect seamlessly by a fastening means that allows the entire assembly to function as intended. The hoop net assembly includes four stabilizing cords positioned equidistant from each other along the ring, which cords converge at the center of the hoop net assembly and are connected to each other by a fastening means, then further connected to a single draw cord. The draw cord is used to cast the assembled hoop net into water to a desired depth and pulled back into the boat with live bait. Once the hoop net assembly has been used, the metal rods are easily disconnected to facilitate folding the hoop net in half for easy storage and portability.

The present invention is a hoop net comprised of netting mounted to two or more semicircular tubular rods, forming a ring that maintains its shape and structural integrity. The two semicircular tubular rods are fashioned to connect seamlessly by a fastening means that allows the entire assembly to function as intended. The hoop net assembly includes four stabilizing cords positioned equidistant from each other along the ring, which cords converge at the center of the hoop net assembly and are connected to each other by a fastening means, then further connected to a single draw cord. The draw cord is used to cast the assembled hoop net into water to a desired depth and pulled back into the boat with live bait. Once the hoop net assembly has been used, the metal rods are easily disconnected to facilitate folding the hoop net in half for easy storage and portability.

The present invention is a hoop net comprised of netting mounted to two or more semicircular tubular rods, forming a ring that maintains its shape and structural integrity. The two semicircular tubular rods are fashioned to connect seamlessly by a fastening means that allows the entire assembly to function as intended. The hoop net assembly includes four stabilizing cords positioned equidistant from each other along the ring, which cords converge at the center of the hoop net assembly and are connected to each other by a fastening means, then further connected to a single draw cord. The draw cord is used to cast the assembled hoop net into water to a desired depth and pulled back into the boat with live bait. Once the hoop net assembly has been used, the metal rods are easily disconnected to facilitate folding the hoop net in half for easy storage and portability.

The present invention is a hoop net comprised of netting mounted to two or more semicircular tubular rods, forming a ring that maintains its shape and structural integrity. The two semicircular tubular rods are fashioned to connect seamlessly by a fastening means that allows the entire assembly to function as intended. The hoop net assembly includes four stabilizing cords positioned equidistant from each other along the ring, which cords converge at the center of the hoop net assembly and are connected to each other by a fastening means, then further connected to a single draw cord. The draw cord is used to cast the assembled hoop net into water to a desired depth and pulled back into the boat with live bait. Once the hoop net assembly has been used, the metal rods are easily disconnected to facilitate folding the hoop net in half for easy storage and portability.

An arrangement, a system and a method relating to a well boat- and service vessel (1) for transporting or storing fish or other aquatic organisms. There are provided, inter alia, a well boat- and service vessel (1) that includes a self-floating, exchangeable well unit (2), a propulsion unit (3), wherein the propulsion unit includes propulsion elements (4), steering and positioning elements, a dock (5) for the well unit, positioning and attachment elements for positioning and securing the well unit (2) in the dock (5).

An arrangement, a system and a method relating to a well boat- and service vessel (1) for transporting or storing fish or other aquatic organisms. There are provided, inter alia, a well boat- and service vessel (1) that includes a self-floating, exchangeable well unit (2), a propulsion unit (3), wherein the propulsion unit includes propulsion elements (4), steering and positioning elements, a dock (5) for the well unit, positioning and attachment elements for positioning and securing the well unit (2) in the dock (5).

A seine net calibration target for an image sensor can include a given set of seine nets connected to form a polygon and another set of seine nets. Each seine net of the other set of seine nets is coupled to a vertex of the polygon at a given end and coupled to a respective one of a plurality of boats at another end. The seine net calibration target can also include a plurality of light sources arranged along a top edge of the given set of seine nets and the other set of seine nets. The plurality of light sources emits light at a predetermined wavelength.

A seine net calibration target for an image sensor can include a given set of seine nets connected to form a polygon and another set of seine nets. Each seine net of the other set of seine nets is coupled to a vertex of the polygon at a given end and coupled to a respective one of a plurality of boats at another end. The seine net calibration target can also include a plurality of light sources arranged along a top edge of the given set of seine nets and the other set of seine nets. The plurality of light sources emits light at a predetermined wavelength.

An underwater mobile body includes: a movement control unit that controls movement underwater; a detection unit that moves underwater under the control of the movement control unit and that detects a position of a fish; and a guidance unit that guides the fish based on the position of the fish detected by the detection unit.

A fish-sorting system for sorting fish in a dragged fishing net (1), wherein the fish are actively sorted by means of a detection device (2, 3) which detects at least one size of a fish to be sorted; a processing unit which compares the size detected by the detection means (2, 3) with the desired size; and a sorting device (4) which retains fish in the fishing net (1) of a size greater than the desired size and which releases fish of a size smaller than the desired size from the fishing net (1) on the basis of the comparison between the detected size and the desired size carried out by the processing unit.