A net retaining system includes a base component and a head component. The base component includes a first surface, an opposite second surface, a retention member provided to the first surface and a cradle projecting from the first surface and configured to grip a net rim near a net handle. The head component includes, a first engagement member facing a first direction, a second engagement member facing a second, opposite direction and a column having first and second ends. The first and second engagement members are configured for selective coupling with the retention member of the base component. The column separates the first and second engagement members and is configured to extend through the net handle so as to resist rotation relative to the net handle.

A net retaining system includes a base component and a head component. The base component includes a first surface, an opposite second surface, a retention member provided to the first surface and a cradle projecting from the first surface and configured to grip a net rim near a net handle. The head component includes, a first engagement member facing a first direction, a second engagement member facing a second, opposite direction and a column having first and second ends. The first and second engagement members are configured for selective coupling with the retention member of the base component. The column separates the first and second engagement members and is configured to extend through the net handle so as to resist rotation relative to the net handle.

A cephalopod rearing cage capable of maintaining a cephalopod alive, wherein at least a portion of the cephalopod rearing cage is constituted by using a mesh sheet of not less than 4 mesh. Also provided is a cephalopod escape prevention sheet capable of maintaining a cephalopod alive, wherein at least a portion of the cephalopod escape prevention sheet is constituted by using a mesh sheet of not less than 4 mesh.

A production method for a headline sonar cable characterized by steps of: a. providing a first strength member (14); b. coupling to strength member (14) a conductor (122); c. forming a layer of polymeric material about the combination of strength member (14) and conductor (122) while ensuring that the conductor remains slack; d. forming a flow shield around the layer of polymeric material, thus forming an elongatable internally located conductive structure; and e. braiding a strength-member jacket layer (52) of polymeric material around the elongatable internally located conductive structure while ensuring that the conductor is slack when surrounded by the jacket layer (52). For another embodiment, an optical fibre is wrapped around the exterior of the layer of polymeric material within which is enclosed a braided conductor formed about the first strength member (14). Other embodiments employ further thermo-plastic layers and further sheaths and further conductors.

A harvesting device particularly suited for harvesting artemia cysts. The invention in its various embodiments comprises a frame and a net coupled to the frame. The frame can include a front support frame, a rear support frame and a sledding frame. A net having a first end and a second end can be secured to the front and rear support frames respectively. In certain embodiments, the net has an aspect ratio or 4:1. One or more skids can be coupled to the frame. In certain embodiments, the skids are coupled to the sledding frame. In yet other embodiments, the skids are coupled to the sledding frame at substantially the joining of the front support frame and the sledding frame. The second end of the net can be attached to a conduit in communication with a harvest vessel by a coupling. The harvest vessel can include one or more dewatering stations in communication with the conduit.

Landing nets including a handle, a pivot mechanism, a frame, and a net. The pivot mechanism is mounted to the handle and configured to pivot between a stowed configuration and a deployed configuration. The frame is mounted to the pivot mechanism. The frame overlies the handle in the stowed configuration and is disposed distal the handle in the deployed configuration. The net is supported by the frame. In some examples, the landing net includes a container configured to contain at least a portion of the frame when the frame is in the collapsed configuration.

Landing nets including a handle, a pivot mechanism, a frame, and a net. The pivot mechanism is mounted to the handle and configured to pivot between a stowed configuration and a deployed configuration. The frame is mounted to the pivot mechanism. The frame overlies the handle in the stowed configuration and is disposed distal the handle in the deployed configuration. The net is supported by the frame. In some examples, the landing net includes a container configured to contain at least a portion of the frame when the frame is in the collapsed configuration.

A fishing device includes a net disposed in a body of water containing fishes. A plurality of posts, wherein each post further includes a stem, a bottom cross disposed at a lower portion of the stem; a cross bar disposed at a top end of the stem; and a cord. The stem is an upright elongated protrusion extending from under a bottom to above a surface of the body of water. The cord is slidably secured to the cross bar. A first end of the cord is secured to a weight. A second end of the cord is secured to the net. The fishing device includes a release mechanism. The release mechanism grabs a portion of the cord to hold the weight in a first position adjacent to the cross bar. A bait system is disposed at or adjacent to a center of the net.

A fishing device includes a net disposed in a body of water containing fishes. A plurality of posts, wherein each post further includes a stem, a bottom cross disposed at a lower portion of the stem; a cross bar disposed at a top end of the stem; and a cord. The stem is an upright elongated protrusion extending from under a bottom to above a surface of the body of water. The cord is slidably secured to the cross bar. A first end of the cord is secured to a weight. A second end of the cord is secured to the net. The fishing device includes a release mechanism. The release mechanism grabs a portion of the cord to hold the weight in a first position adjacent to the cross bar. A bait system is disposed at or adjacent to a center of the net.

A tether is a net that kinks and is automatically deformed upon tension release. The tether has a length of several kilometers to several tens of kilometers upon deployment and is capable of shrinking to have a length of approximately several tens of meters to several hundreds of meters by kinking and automatically being deformed when the tension is released because of cutting or the like.