A farming molluscs device has containers configured to contain molluscs and connect to a ballast. The device has a first pivot axle which is horizontal, parallel to a longitudinal direction, and at least two rigid arms which connect the ballast, parallel to the longitudinal direction and the pivot axle. A filling or emptying of the ballast causes the arm to rotate about the first pivot axle and causes a phenomenon of rolling of the molluscs in the containers.

A farming molluscs device has containers configured to contain molluscs and connect to a ballast. The device has a first pivot axle which is horizontal, parallel to a longitudinal direction, and at least two rigid arms which connect the ballast, parallel to the longitudinal direction and the pivot axle. A filling or emptying of the ballast causes the arm to rotate about the first pivot axle and causes a phenomenon of rolling of the molluscs in the containers.

A mortality trap (150) for a spar buoy fish pen (100) is configured to receive and trap deceased fish, or morts (M), that sink from the fish pen. The mortality trap attaches to a lower portion of the spar buoy (110) to define a first passage (90). The sinking mort passes into an upper receiver portion (150U) of the mortality trap, and encounters a sloping transverse panel (154). Gravity causes the mort to continue through a second passage (B) into a lower entrapment portion (150L), and further into a region underlying the transverse panel (154) preventing the mort from escaping if it becomes positively buoyant. The entrapment portion optionally includes a converging channel into a valved port, to permit extraction of morts. The mortality trap may be located on the distal end of the spar buoy, or at an intermediate location on the lower portion of the spar buoy.

A mortality trap (150) for a spar buoy fish pen (100) is configured to receive and trap deceased fish, or morts (M), that sink from the fish pen. The mortality trap attaches to a lower portion of the spar buoy (110) to define a first passage (90). The sinking mort passes into an upper receiver portion (150U) of the mortality trap, and encounters a sloping transverse panel (154). Gravity causes the mort to continue through a second passage (B) into a lower entrapment portion (150L), and further into a region underlying the transverse panel (154) preventing the mort from escaping if it becomes positively buoyant. The entrapment portion optionally includes a converging channel into a valved port, to permit extraction of morts. The mortality trap may be located on the distal end of the spar buoy, or at an intermediate location on the lower portion of the spar buoy.

An offshore farming system comprising an elongated vertical support column floating vertically in water with a larger extension below sea surface than above the sea surface, and a rigid cage structure enclosing the elongated vertical support column in circumferential direction and arranged movable in longitudinal direction of the elongated vertical support column.

A submersible pen system (100) for aquaculture is described. The pen comprises a hub (4) for coupling the pen system (100) to an anchor and a collar (1) circumferentially arranged around the hub (4) and having a variable buoyancy. A first end of at least one net panel (6) is coupled to the collar (1) and at least one tensioning element (5) is coupled to a second end of the at least one net panel (6). A stabilising diaphragm (50) is coupled to each of the hub (4) and the collar (1) and is at least partially deformable, the at least one net panel (6) providing surfaces at least partially defining a pen having a containment volume. The stabilising diaphragm (50) is configured to operatively provide a stabilising force between the hub (4) and the collar (1) such that a deformation of the stabilising resilient diaphragm (50) effects a degree of movement in the collar (1) with respect to the hub (4) when exposed to external dynamic loading.

A submersible pen system (100) for aquaculture is described. The pen comprises a hub (4) for coupling the pen system (100) to an anchor and a collar (1) circumferentially arranged around the hub (4) and having a variable buoyancy. A first end of at least one net panel (6) is coupled to the collar (1) and at least one tensioning element (5) is coupled to a second end of the at least one net panel (6). A stabilising diaphragm (50) is coupled to each of the hub (4) and the collar (1) and is at least partially deformable, the at least one net panel (6) providing surfaces at least partially defining a pen having a containment volume. The stabilising diaphragm (50) is configured to operatively provide a stabilising force between the hub (4) and the collar (1) such that a deformation of the stabilising resilient diaphragm (50) effects a degree of movement in the collar (1) with respect to the hub (4) when exposed to external dynamic loading.

Disclosed herein are stackable cages for holding oysters, modular cages for holding oysters, floating platforms for deploying and retrieving oyster cages from a long line, and floats adapted to engage a plurality of oyster long lines and from which one or more oyster cages may depend.

Disclosed herein are stackable cages for holding oysters, modular cages for holding oysters, floating platforms for deploying and retrieving oyster cages from a long line, and floats adapted to engage a plurality of oyster long lines and from which one or more oyster cages may depend.

Techniques and systems for robotic aquaculture are described. In one embodiment, for example, a mariculture system may include an aquatic animal containment system operative to hold a population of aquatic animals, the aquatic animal containment system comprising an enclosed hull having a receptacle configured to receive a mechanical core, the mechanical core configured to store at least one sub-system to implement at least one function of mariculture system, and a position management system operative to maintain the enclosed hull at a depth below a surface of a body of water. Other embodiments are described.