Disclosed is a method for guiding aquatic organisms. The method includes disposing a plurality of electrode units at a distance from one another in water; and applying an electrical pulse to at least one electrode unit of the plurality of electrode units to generate an electric field and/or a magnetic field around the at least one electrode unit to guide the aquatic organisms by stimulating the aquatic organisms with the generated electric and/or magnetic fields.

Certain types of fish respond differently to certain stimuli than other types of fish. Particularly, predetermined sound or vibration can cause certain types of fish to move away or jump. These reactions by particular types of fish can be used to capture the fish or prevent then from accessing parts of water systems. An exemplary capture mechanism employs multiple receptacles adapted to catch jumping fish from the air. An exemplary barrier of directed sound can prevent fish migration.

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 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 submersible lantern is anchored to the sea floor and kept upright by a float and a countersink weight. The lantern emits multiple patterns of green and white light at specific frequencies and intensities that repel catfish while causing shrimp to surface. The lantern has an elongated body, and includes a float and weight to vertically orient the lantern underwater so that it emits light 360 degrees around the lantern body. A push button switch along with a PCB board cycles the lights and power level to the lights based on the particular application. A wireless circuit is used for remote operation via a mobile phone or other wireless device. The lantern can be used both in the sea and on land, and includes a two-part power connector to connect to various conventional power sources.

A submersible lantern is anchored to the sea floor and kept upright by a float and a countersink weight. The lantern emits multiple patterns of green and white light at specific frequencies and intensities that repel catfish while causing shrimp to surface. The lantern has an elongated body, and includes a float and weight to vertically orient the lantern underwater so that it emits light 360 degrees around the lantern body. A push button switch along with a PCB board cycles the lights and power level to the lights based on the particular application. A wireless circuit is used for remote operation via a mobile phone or other wireless device. The lantern can be used both in the sea and on land, and includes a two-part power connector to connect to various conventional power sources.

Animal sensing systems and methods are described. An animal sensing system can include an input section with an entrance and an output section having at least two output paths each having its own exit. An animal can enter the animal sensing system through the entrance. A sensor within a sensing area of the input section can detect one or more characteristics of the animal, and can communicate the detected characteristic(s) to a central processing unit. The central processing unit can use the received data to classify the animal based on the detected characteristic(s), and then control a directional guide, such as a gate, in the animal sensing system on the basis of the classification, so as to direct the animal within the animal sensing system, such as to allow access to only one of the output paths at a time. The animal may thus be allowed to exit the animal sensing system through only one output path, directing the animal to a desired location based on the classification.

A sensor assembly for a castable lure is provided including a pressure sensor configured to measure a water pressure applied to the castable lure when deployed in an underwater environment, a processor, and a memory including computer program code. The computer program code configured to, when executed on the processor, cause the processor to receive pressure data from the pressure sensor, correlate the pressure data with time stamp data, cause the pressure data and correlated time stamp data to be stored in the memory, determine a data connection status between a transceiver and a marine electronic device, and in response to determining that a data connection exists, cause the pressure data and the correlated time stamp data to be transmitted to the marine electronic device. The pressure data and correlated pressure data correspond to a depth profile for a cast of the castable lure.

A sensor assembly for a castable lure is provided including a pressure sensor configured to measure a water pressure applied to the castable lure when deployed in an underwater environment, a processor, and a memory including computer program code. The computer program code configured to, when executed on the processor, cause the processor to receive pressure data from the pressure sensor, correlate the pressure data with time stamp data, cause the pressure data and correlated time stamp data to be stored in the memory, determine a data connection status between a transceiver and a marine electronic device, and in response to determining that a data connection exists, cause the pressure data and the correlated time stamp data to be transmitted to the marine electronic device. The pressure data and correlated pressure data correspond to a depth profile for a cast of the castable lure.

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.