An aquatic system configured for suspending a structure (2； 9； 20； 21) in a body of water (W), comprising at least two buoyancy control arrangements (15) configured for connection to the structure (2； 9； 20； 21) and to a seabed (B) below the body of water (W). The structure (2； 9； 20； 21) is moored to the seabed (B) via the at least two buoyancy control arrangements (15). Each buoyancy control arrangement (15) comprising a first buoyancy device (4) and a second buoyancy device (3), the buoyancy of each of the first buoyancy devices (4) and each of the second buoyancy devices (3) is independently controllable in order to adjust the vertical and horizontal position of the structure (2； 9； 20； 21) and vertical and horizontal restoring capacity of the aquatic system in the body of water (W).
