A cephalopod feeder, a cephalopod feeding method using the cephalopod feeder, and a cephalopod fed with the cephalopod feeder. The cephalopod feeder includes a shell having an inner surface spaced apart from an outer surface, the inner surface defining a volume of the shell; and a feed placed at least partly in the volume of the shell.

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 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.

Method for cultivating paralarvae of the common octopus, Octopusvulgaris up to the settlement thereof (benthic phase), based on a diet of prey containing the caprellids Pfttisica marina and CaprelIa equilibra and/or gammarids of the genus Jassa spp. Factors such as light conditions, water renewal and temperature, inter alia, are optimized to obtain maximum paralarvae survival.

Method for cultivating paralarvae of the common octopus, Octopusvulgaris up to the settlement thereof (benthic phase), based on a diet of prey containing the caprellids Pfttisica marina and CaprelIa equilibra and/or gammarids of the genus Jassa spp. Factors such as light conditions, water renewal and temperature, inter alia, are optimized to obtain maximum paralarvae survival.

It is disclosed a system for producing methanol/methane, said system comprising an electrolysis section (1) producing hydrogen and oxygen from the cleaving of water molecules, and said system further comprising a closed cultivation/breeding container/pond (5) for aquatic organisms creating CO.sub.2 through their metabolism to be liberated into the water surrounding said organisms forming CO.sub.2-rich water, said CO.sub.2-rich water being transported to a CO.sub.2-liberating section forming gaseous CO.sub.2 and CO.sub.2-poor water, said liberated gaseous CO.sub.2 being transported to a reactor (6,6) and being combined with said hydrogen from said electrolysis plant (1) for creating methanol and/or methane as an end product, said methanol/methane being isolated and exited from said system.

It is disclosed a system for producing methanol/methane, said system comprising an electrolysis section (1) producing hydrogen and oxygen from the cleaving of water molecules, and said system further comprising a closed cultivation/breeding container/pond (5) for aquatic organisms creating CO.sub.2 through their metabolism to be liberated into the water surrounding said organisms forming CO.sub.2-rich water, said CO.sub.2-rich water being transported to a CO.sub.2-liberating section forming gaseous CO.sub.2 and CO.sub.2-poor water, said liberated gaseous CO.sub.2 being transported to a reactor (6,6) and being combined with said hydrogen from said electrolysis plant (1) for creating methanol and/or methane as an end product, said methanol/methane being isolated and exited from said system.

A method of growing shellfish is disclosed. The method comprises obtaining a support tray (I) with recesses (7) where at least some of the recesses (7) incorporate means adapted to create a deliberately formed alphanumeric, written or pictorial mark on the shellfish as it grows. Shellfish spat are attached to at least some of the recesses (7) and the tray (I) is placed in water so that the spat grow into substantially mature shellfish within the recesses (7). The spat each grow generally in the shape of their respective recess (7) so that the mark is created on the shellfish as it grows.

A method of growing shellfish is disclosed. The method comprises obtaining a support tray (I) with recesses (7) where at least some of the recesses (7) incorporate means adapted to create a deliberately formed alphanumeric, written or pictorial mark on the shellfish as it grows. Shellfish spat are attached to at least some of the recesses (7) and the tray (I) is placed in water so that the spat grow into substantially mature shellfish within the recesses (7). The spat each grow generally in the shape of their respective recess (7) so that the mark is created on the shellfish as it grows.

An aquaculture premix and a method of manufacturing a granulated or powdered aquaculture premix are provided.