An underwater lighting system includes a light housing. The light housing includes a weighted base having a bottom surface with a bottom edge and a cover. The cover and the weighted base cooperate to define a cover interior. The cover interior is waterproof. The light housing also includes a light source positioned within the cover interior. The underwater lighting system is configured to prevent a fishing lure or cast net from snagging on the underwater lighting system.

A light emitting device 100, 200, 500 for a subsea environment has at least one light source and a power source. The device further comprises a housing 110 having a first housing portion 110a, wherein the at least one light source and the power source are enclosed within the first housing portion and a second housing portion 110b comprising a fluid-tight seal for the housing. A system 400, 600 is also provided comprising a plurality of light emitting devices.

A light emitting device 100, 200, 500 for a subsea environment has at least one light source and a power source. The device further comprises a housing 110 having a first housing portion 110a, wherein the at least one light source and the power source are enclosed within the first housing portion and a second housing portion 110b comprising a fluid-tight seal for the housing. A system 400, 600 is also provided comprising a plurality of light emitting devices.

A lamp for use under water, comprising: an electrical lighting means, electrical connections for the power supply of the electrical lighting means, and a housing, wherein the housing is translucent at least in sections and defines a watertightly closable hollow space, wherein the electrical lighting means and the electrical connections are arranged within the hollow space, wherein the housing forms a mechanical shell surrounding the hollow space, the mechanical shell having a double curvature at each point of the shell; and a use of the lamp as a light bait when fishing.

A dip net provided with lockable hoops capable of being folded leftwards and rightwards comprises a net rod, a hoop mounting base mounted on the net rod, and hoops including a left hoop and a right hoop, wherein mounting plates are arranged on the left side and the right side of the hoop mounting base, and two rotary bases are arranged at the rear end of the left hoop and the rear end of the right hoop and are hinged to the mounting plates through rotary shafts. The left hoop and the right hoop can be folded and are independently connected to the hoop mounting base, so that assembly is convenient; and the size can be reduced for transportation and carrying, so that carrying storage are facilitated.

A dip net provided with lockable hoops capable of being folded leftwards and rightwards comprises a net rod, a hoop mounting base mounted on the net rod, and hoops including a left hoop and a right hoop, wherein mounting plates are arranged on the left side and the right side of the hoop mounting base, and two rotary bases are arranged at the rear end of the left hoop and the rear end of the right hoop and are hinged to the mounting plates through rotary shafts. The left hoop and the right hoop can be folded and are independently connected to the hoop mounting base, so that assembly is convenient; and the size can be reduced for transportation and carrying, so that carrying storage are facilitated.

The present invention relates to a harvesting system (11, 12, 13, 14, 24, 28) for harvesting zooplankton or mesopelagic fishes, said system comprising: an underwater device (1, 4, 7, 16, 23, 29) for being lowered and towed into the sea, said underwater device comprising a housing provided with one or more inlets (30) adapted to receive a zooplankton or mesopelagic fishes-containing fluid, wherein said housing comprises one or more manifolds (2); said underwater device further comprising one or more sources of light (26, 27) facilitating schooling of zooplankton towards an illuminated area; a fluidic connection (21) fluidically connecting said underwater device to a surface vessel; wherein said one or more inlets are inlets to said one or more manifolds and said one or more manifolds converge into said fluidic connection, wherein said one or more sources of light are located within said one or more inlets.

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.

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 lighting fish attracting device includes a fixed support, a solar panel, a battery, a lamp, and at least one floating member that is configured to float on a water surface when in use. The fixed support and the battery are mounted on the at least one floating member. The solar panel and the lamp are mounted on the fixed support. The battery is connected to the lamp and the solar panel. The lamp is located on a dark side of the solar panel, and the dark side is configured to face the water surface when in use.