The invention relates to a system and method that enables the capture of high contrast images of sea lice contaminated fish. The system comprises a light emitting device, a 2D array detector, and a first polarisation filter, and utilizes polarised narrow bands of light in order to obtain a strong contrast between sea lice and the skin of the fish. A number of narrow bands of light are irradiated onto a fish, and the resulting reflection(s) is/are polarisation filtered before being detected. The detected light is subsequently used in order to generate a high contrast image of the fish.

The invention relates to a system and method that enables the capture of high contrast images of sea lice contaminated fish. The system comprises a light emitting device, a 2D array detector, and a first polarisation filter, and utilizes polarised narrow bands of light in order to obtain a strong contrast between sea lice and the skin of the fish. A number of narrow bands of light are irradiated onto a fish, and the resulting reflection(s) is/are polarisation filtered before being detected. The detected light is subsequently used in order to generate a high contrast image of the fish.

A method of culturing an aquaculture of an aquatic animal species of interest is disclosed. The method comprises inoculating the aquaculture with bacteria of at least one genera selected from the group consisting of Pseudomonas, Limnohabitans, Janthinobacterium, Stenotrophomonas, Aeromonas, Acinetobacter and Morganella, wherein the bacteria are provided in an amount sufficient to increase the survival and/or weight of the aquatic animal, thereby culturing the aquaculture of the aquatic animal species.

A method of culturing an aquaculture of an aquatic animal species of interest is disclosed. The method comprises inoculating the aquaculture with bacteria of at least one genera selected from the group consisting of Pseudomonas, Limnohabitans, Janthinobacterium, Stenotrophomonas, Aeromonas, Acinetobacter and Morganella, wherein the bacteria are provided in an amount sufficient to increase the survival and/or weight of the aquatic animal, thereby culturing the aquaculture of the aquatic animal species.

A cage is for farming fish. The cage floats in a water column and the upper portion of the cage has a surrounding floating body arranged to float in a water surface. An enclosure is located between the upper portion and the lower portion of the cage, the enclosure being closed in its lower portion and forming an inside and an outside. The cage has a liquid-tight wall which is attached to the floating body and which extends from the water surface downwards in the water column. The liquid-tight wall forms a lower edge portion. The cage is provided, in its upper portion, with at least one flow booster for creating a circular water current within the liquid-tight wall. A method for creating an upward water current of fresh water within the cage is also provided.

A cage is for farming fish. The cage floats in a water column and the upper portion of the cage has a surrounding floating body arranged to float in a water surface. An enclosure is located between the upper portion and the lower portion of the cage, the enclosure being closed in its lower portion and forming an inside and an outside. The cage has a liquid-tight wall which is attached to the floating body and which extends from the water surface downwards in the water column. The liquid-tight wall forms a lower edge portion. The cage is provided, in its upper portion, with at least one flow booster for creating a circular water current within the liquid-tight wall. A method for creating an upward water current of fresh water within the cage is also provided.

An abundance of specific species of phytoplankton in a phytoplankton group in which a plurality of kinds coexists is calculated in a simple manner. Based on a reference sample intensity ratio r.sub.0, a reference sample total fluorescence intensity I.sub.0, and an existing quantity K.sub.0 of specific species of phytoplankton, an intensity ratio r.sub.d of other species of plankton is calculated. An analysis sample that is expected to have similarity with the reference sample is irradiated with the excitation light, an intensity of fluorescence emitted from the analysis sample is measured in each of wavelength bands A and B, and an intensity ratio r is calculated. A total fluorescence intensity I is measured, and an existing quantity K of the specific species of the phytoplankton is calculated based on the intensity ratio r.sub.d of other species of plankton, the intensity ratio r, and the total fluorescence intensity I.

Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for sea lice mitigation. In some implementations, a method includes generating (i) a first record for a first fish indicating an extent of sea lice infestation for the first fish at a first time and (ii) a second record, different than the first record, for a second fish, different than the first fish, indicating an extent of sea lice infestation for the second fish at the first time; and training, based at least in part on the first record and the second record, a model that determines, given one or more input records for a third fish, whether the third fish is likely to be healthy at a second time subsequent to the first time.

Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for sea lice mitigation. In some implementations, a method includes generating (i) a first record for a first fish indicating an extent of sea lice infestation for the first fish at a first time and (ii) a second record, different than the first record, for a second fish, different than the first fish, indicating an extent of sea lice infestation for the second fish at the first time; and training, based at least in part on the first record and the second record, a model that determines, given one or more input records for a third fish, whether the third fish is likely to be healthy at a second time subsequent to the first time.

The present invention relates to a method for preparing a tropical fish feed by using brine shrimp, and a tropical fish feed prepared thereby, and, more specifically, to: a method for preparing a tropical fish feed by using brine shrimp, and a tropical fish feed prepared thereby, the method feeding spirulina and Haematococcus to hatched brine shrimp to prepare a tropical fish feed, and thus can promote the growth of tropical fish, boost the immune system and improve the consumption, digestion, absorption and palatability for tropical fish.