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.

Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for escape detection and mitigation for aquaculture. In some implementations, a method includes obtaining one or more images that depict one or more fish within an enclosure; generating, as a result of providing the one or more images to multiple detection models, a value that reflects a quantity of fish that are depicted in the images that are likely a member of each different type of fish; detecting an error condition relating to a possible opening of the enclosure based at least on the value; and in response to detecting the error condition relating to the possible opening of the enclosure, initiating one or more mitigation actions relating to the possible opening.

Patent for structure used in oyster cultivation, wherein the invention comprises a base (1), having four holes (2), where four pins are fixed, fixing the base to the bottom of the sea, base (1) has four other holes, wherein four vertical tubes (3) are fixed; after fixing tubes (3) to the base (1) of the structure, box (4) is settled over base (1), using tubes (3) as guides; afterwards, after putting oysters seeds in box (4), lid (5) is fixed over box (4), followed by sealing of lid (5), installed over box (4), in a way to avoid strange elements to the cultivation to access the oysters, then one end of rope (7) is fixed to ring (6) present in lid (5) and then the other end of rope (7) is fixed to counterweight (9), after passing this end of rope (7) by the hole present in buoy (8) (ring (6), fixed to one end of rope (7), buoy (8), counterweight (9), fixed to the other end of rope (7), help to maintain the structure stable in vertical position at the bottom of the sea during tide variations as well as during any sea turbulence at the cultivation location.

Patent for structure used in oyster cultivation, wherein the invention comprises a base (1), having four holes (2), where four pins are fixed, fixing the base to the bottom of the sea, base (1) has four other holes, wherein four vertical tubes (3) are fixed; after fixing tubes (3) to the base (1) of the structure, box (4) is settled over base (1), using tubes (3) as guides; afterwards, after putting oysters seeds in box (4), lid (5) is fixed over box (4), followed by sealing of lid (5), installed over box (4), in a way to avoid strange elements to the cultivation to access the oysters, then one end of rope (7) is fixed to ring (6) present in lid (5) and then the other end of rope (7) is fixed to counterweight (9), after passing this end of rope (7) by the hole present in buoy (8) (ring (6), fixed to one end of rope (7), buoy (8), counterweight (9), fixed to the other end of rope (7), help to maintain the structure stable in vertical position at the bottom of the sea during tide variations as well as during any sea turbulence at the cultivation location.

An aquaculture luminaire (10, 12) generates below the water surface upward light (26) and downward light (24). The upward light (26) is all directed with an angle to the vertical greater than a threshold angle. The division of light between the upward and downward directions may be configurable. Alternatively or additionally, the threshold angle may be configurable so that it ensures the light exceeds the angle for total internal reflection at the water surface. In this way, the luminaire is adaptable to the intended installation position of the luminaire and/or the prevailing water surface conditions (e.g. waves).

Computer-implemented techniques for forecasting growth of a set of aquatic organisms in an aquaculture environment using time-series models. The techniques can be used to predict the growth of a set of aquatic organisms in a fish farm enclosure in a period. In some variations, the techniques proceed by obtaining an evidentiary time series (e.g., daily biomass estimates produced by a biomass estimation system) and a set of one or more reference (covariant) time series (e.g., daily biomass estimates produced by a biological model of fish growth). The techniques construct a time-series model from the evidentiary time series and the set of reference time series. The techniques use the constructed time-series model to forecast the evidentiary time series. In some variations, the time-series model is a Bayesian structural time-series model or other state space model for time series data.

Computer-implemented techniques for multi-modal aquatic biomass estimation includes determining a fish mass measurement, a fish count, or a direct fish biomass estimate from a sample of one or more digital images or digital video captured by a digital camera immersed underwater in a fish farm enclosure. A technique further includes determining a plurality of fish densities for a plurality of water volumes within the fish farm enclosure based on analysis of signals received from a plurality of bias estimation sensors immersed underwater in the fish farm enclosure. The technique also includes computing a bias-adjusted fish mass measurement, fish count, or direct fish biomass estimate for the fish farm enclosure based on (i) the fish mass measurement, the fish count, or the direct fish biomass estimate determined from the sample of one or more digital images or digital video captured by the digital camera immersed underwater in the fish farm enclosure and (ii) the plurality of fish densities determined for the plurality of water volumes.

Aquatic structures with adjustable buoyancy constructed in part with a vent valve for a buoyancy control device suitable for divers, where the vent valve may be opened by any combination of over-pressure, manual pressure relief or a powered means, where a force to a valve plug is applied by means of a spring that is constrained to prevent entirely lateral and angular movement but in which movement of the plug in the axis of the seat is unconstrained.

Aquatic structures with adjustable buoyancy constructed in part with a vent valve for a buoyancy control device suitable for divers, where the vent valve may be opened by any combination of over-pressure, manual pressure relief or a powered means, where a force to a valve plug is applied by means of a spring that is constrained to prevent entirely lateral and angular movement but in which movement of the plug in the axis of the seat is unconstrained.