A low head oxygenator system includes one or more chambers, each of the one or more chambers having an open top, and one or more distribution plates, each distribution plate disposed over the open top of a corresponding one of the one or more chambers. Each of the one or more distribution plates has a predetermined number of orifices distributed within one or more zones of the respective distribution plate and no orifices in at least one remaining zone of the respective distribution plate. The oxygenator system further includes a container (e.g. trough), disposed on top of the one or more distribution plates, and configured to allow a liquid contained in the container to flow through the orifices of the one or more distribution plates into the one or more chambers.

A low head oxygenator system includes one or more chambers, each of the one or more chambers having an open top, and one or more distribution plates, each distribution plate disposed over the open top of a corresponding one of the one or more chambers. Each of the one or more distribution plates has a predetermined number of orifices distributed within one or more zones of the respective distribution plate and no orifices in at least one remaining zone of the respective distribution plate. The oxygenator system further includes a container (e.g. trough), disposed on top of the one or more distribution plates, and configured to allow a liquid contained in the container to flow through the orifices of the one or more distribution plates into the one or more chambers.

An aquarium structure for the housing and display of aquatic life, particularly jellyfish, adapted to provide a beneficial flow of fluid within it, such as a rising or suspending current. The aquarium structure includes a bottom surface, at least one sidewall, and a barrier disposed within in spaced apart relation to the bottom surface by a predetermined distance to form a gap therebetween. In preferred embodiments, the aquarium structure includes an air pump and also, is generally cylindrical in shape and disposed vertically along its major axis, to offer a wide area for viewing aquatic life within, and yet a relatively small and compact aquarium housing suitable for desktop use, although the invention may have other sizes and configurations. The aquarium housing can also include a lighting assembly disposed below the viewing area and configured to direct illumination therein and in some embodiments onto other surfaces above the aquarium housing.

A water treatment and recirculation system includes means to transport water flows at required pressures, a mechanical filter of approximately 100 microns to capture coarse particles, oxygen production means, autonomous electricity generation means, and variable control means using a PLC that administers parameters such as pressure, oxygen and CO.sub.2 levels, flows, pH, etc. The system also includes means to ultrafilter and remove particles of up to 0.02 microns, the purpose being removing organic material macromolecules, disinfecting bacteria and viruses with mechanical removal, and eliminate harmful contaminants such as ammonia, degasifying means to eliminate CO.sub.2 with a multitubular exchanger with membranes made of hydrophobic materials and micro perforations to take CO.sub.2 away to an extraction gas in atmospheric or vacuum conditions; and means to oxygenate water with a multitubular exchanger having membranes constituted by hydrophobic materials and microperforations that inject O.sub.2 into water of a gas under atmospheric conditions.

A system for maintaining fish and shellfish in an anesthetic state, the system includes at least: an anesthetic tank configured to allow the fish and shellfish to be so anesthetized as to be in an anesthetic state; and a maintenance tank configured to allow the fish and shellfish anesthetized in the anesthetic tank to be maintained in the anesthetic state while being transported, wherein, in the anesthesia tank, a carbon dioxide concentration is maintained higher than or equal to 65 ppm as well as lower than or equal to 85 ppm, and an oxygen concentration is maintained higher than or equal to 60%, and wherein, in the maintenance tank, a carbon dioxide concentration is maintained higher than or equal to 10 ppm as well as lower than or equal to 40 ppm, and an oxygen concentration is maintained higher than or equal to 60%.

A method (110) for monitoring at least one aquaculture pond (112) is proposed. The method (110) comprises: a) monitoring at least one aerial parameter of use of the at least one aquaculture pond (112); b) determining a temporal development of the aerial parameter of use; and c) determining an intensity of use of the aquaculture pond (112) by using the temporal development of the aerial parameter of use.

Embodiments of the present disclosure describe an aquaculture environment control system comprising one or more control apparatuses positioned within a vessel at an angle relative to a proximal vessel wall and configured for scouring of the vessel, wherein each control apparatus has a discharge conduit and each discharge conduit has one or more orifices; and a fluid source in fluid communication with each of the control apparatuses. Embodiments of the present disclosure describe a method of controlling an aquaculture environment comprising supplying one or more of a fluid and gas to a control apparatus positioned within a vessel at an angle relative to a proximal vessel wall; and discharging one or more of the fluid and gas from the control apparatus at a fluid velocity sufficient for scouring of the vessel.

Provided is an aquaculture system, including a water tank holding seawater and housing shellfish or fish to be cultivated, a water intake unit for introducing the seawater into the water tank, a draining unit for draining the seawater in the water tank, a first bubble generator that generates and supplies microbubbles with a diameter of not less than 10 m and not more than 100 m in the water tank, and a second bubble generator that generates and supplies nanobubbles with a diameter of not more than 10 m in the water tank, wherein the seawater in the water tank is exchanged by simultaneously carrying out introduction of the seawater using the water intake unit and drainage of the seawater in the water tank using the draining unit.

An embodiment of the present invention makes it possible to sterilize a marine animal with use of sea water and atmospheric air, to the extent that the marine animal can be eaten as an unheated food product. A sterilization method in accordance with an embodiment of the present invention is a method for sterilizing a marine animal as an unheated food product, the method comprising the steps of: producing oxygen-enriched water by mixing electrolyzed atmospheric air into sea water; producing sterilizing water by electrolyzing the oxygen-enriched water; and bringing the marine animal into contact with the sterilizing water, the sterilizing water containing HOCl, OH.sup. and O.sup..

An aquarium having an adjustable lighting system for enhancing the display of fluorescent objects, such as fluorescent fish, contained within the aquarium under various external lighting conditions, such as a dark room or a brightly lit room. The aquarium comprises a tank and a plurality of light sources. Each light source emits light at a different wavelength spectrum which is selected to enhance the display of the fluorescent object under each type of external lighting condition. An electronic control is provided to control the operation of the plurality of light sources such that each light source may be selectively turned on/off based on the external lighting condition, or chronological criteria, to provide the best viewing experience.