Provided are a cultivating system for cultivating aquatic organisms including a load-bearing structure having a top portion with at least two top rims transverse to each other and defining a top portion, a bottom portion, and flexible tank adapted for receiving therein a growing medium and for cultivating therein aquatic organisms. Further, the tank can include at least two sidewalls extending such that at least in one cross-section taken along a plane perpendicular to said top portion, at least two of the sidewalls form a general V-shape converging towards the bottom portion. The system can also include a gas emitting arrangement linkable to a source of pressurized gas and comprising gas emitting nozzles disposed within the flexible tank at the bottom portion.
