In this paper, the result of oceanographic parameters in the water column (salinity, volume and oxygen saturation ratio, apparent oxygen utilization, nutrient concentration of orthophosphate and total inorganic nitrogen) and for the content of total inorganic and organic phosphorus in sediment (layer 0-2 cm) at 3 stations in Limski kanal, sampled in November 2016 and 2017. Two stations were close to the fish farming cages (P1 and P2), where there is a stronger eutrophication pressure and the third was a reference station with minimal impact (REF). Standard oceanographic methods were applied to determine all parameters. By comparing the data, it was estimated whether there were significant differences between the content of phosphorus in the sediment within the stations and between the two investigated years. The values of measured concentrations of nutrients in the water column and the total phosphorus content in the sediment station near the farms (P1 and P2) are significantly higher than at the control station (REF) where there is no cage breeding. However, these values are lower than those found for eutrophic area and other fish farms, and such moderate trophic influence is localized to a relatively narrow area around the fish cage. It has been found that the higher inorganic phosphorus content of the sediment station near fish cages is probably the result of anthropogenic activity, more precisely sedimentation of unused food during the feeding of fish in breeding, as well as their metabolic products. Organic phosphorus measured in the sediment of reference station is predominantly of natural origin and poorly degradable.