A system for cultivating a large quantity of oysters is disclosed herein. The system includes a device that can be placed either on the seabed or the surface of a water environment. The device may be placed at either location and may also be placed further offshore and still be safe from extreme weather conditions. As a result, the benefits of each location are implemented into the system. The system includes an oyster cultivating device including a rectangular frame holding various crates with multiple internal baffles or dividers, and an attached buoyant member for keeping the cultivating frame at or near the surface of the water. The crates are placed such that they fill the volume within the rectangular frame. A buoyant member is then placed on the top end of the rectangular frame. The system provides increased agitation capabilities for oysters to provide a larger and rounder cultivated oyster.

A sea-pen arrangement is for farming fish. The sea-pen arrangement has a service unit with a plurality of shafts projecting downwards and a pontoon at their lower portions. The shafts define an inner area. A net forms a closed enclosure. The sea-pen arrangement further includes at least one sea pen positioned in an outer area on the outside of two shafts. A frame structure has an upper frame with a first fastening portion and a second fastening portion, a bottom frame, and a fence fastened to the upper frame and the bottom frame. The frame structure is fastened to the service unit at the fastening portions, and the frame structure surrounds the at least one sea pen in the outer area.

A sea-pen arrangement is for farming fish. The sea-pen arrangement has a service unit with a plurality of shafts projecting downwards and a pontoon at their lower portions. The shafts define an inner area. A net forms a closed enclosure. The sea-pen arrangement further includes at least one sea pen positioned in an outer area on the outside of two shafts. A frame structure has an upper frame with a first fastening portion and a second fastening portion, a bottom frame, and a fence fastened to the upper frame and the bottom frame. The frame structure is fastened to the service unit at the fastening portions, and the frame structure surrounds the at least one sea pen in the outer area.

A net cage for farming of marine organisms is described, where the net cage is comprised of a main chamber to hold the marine organisms and where the net cage has further water chambers to treat the water before it is circulated back to the main chamber.

A net cage for farming of marine organisms is described, where the net cage is comprised of a main chamber to hold the marine organisms and where the net cage has further water chambers to treat the water before it is circulated back to the main chamber.

A pen system is for farming aquatic organisms. The pen system has an outer surrounding rigid structure and an internal, closed enclosure. The outer surrounding rigid structure forms an upper portion and a lower portion. The pen system further has: an internal surrounding connecting element, the closed enclosure being attached to the connecting element; and a heave-compensation system having a plurality of fluid-filled cylinders, each fluid-filled cylinder being hingedly attached, in a first end portion, to the connecting element, and being hingedly attached, in a second end portion, to the inside of the rigid structure.

An aquatic biofiltration system where invertebrate aquatic filtering organisms in the form of tunicates filter free-floating particulates in a water volume is disclosed. The system provides a habitat for tunicates with at least one residence device (5, 6) adapted to be arranged in a water volume, and a collection system (7) adapted to collect expelled solids from the tunicates. A biofiltration method for filtering particulates from a volume of water is also disclosed.

An aquatic biofiltration system where invertebrate aquatic filtering organisms in the form of tunicates filter free-floating particulates in a water volume is disclosed. The system provides a habitat for tunicates with at least one residence device (5, 6) adapted to be arranged in a water volume, and a collection system (7) adapted to collect expelled solids from the tunicates. A biofiltration method for filtering particulates from a volume of water is also disclosed.

A fish feed dispersing apparatus includes a helical dispersing tube attached to a fish pen with a mounting assembly. The helical dispersing tube has an inlet end that receives fish feed from a source, and includes a number of spaced apertures that disperse the received fish feed. A mounting assembly supports the dispersing tube, and includes two spaced-apart attachment members connected by a plurality of elongate members, and a plurality of hanger subassemblies. Each hanger subassembly has a first end attached to one of the elongate members and a second end that includes a clamp configured to engage the helical dispersing tube. The hangar assemblies are adjustable, and support the helical dispersing tube during use.

A fish feed dispersing apparatus includes a helical dispersing tube attached to a fish pen with a mounting assembly. The helical dispersing tube has an inlet end that receives fish feed from a source, and includes a number of spaced apertures that disperse the received fish feed. A mounting assembly supports the dispersing tube, and includes two spaced-apart attachment members connected by a plurality of elongate members, and a plurality of hanger subassemblies. Each hanger subassembly has a first end attached to one of the elongate members and a second end that includes a clamp configured to engage the helical dispersing tube. The hangar assemblies are adjustable, and support the helical dispersing tube during use.