A quick connector for coupling, in alignment with a longitudinal axis, an offshore floating structure to a pre-laid mooring system, the quick connector comprising: a base structure configured to be coupled to an upper body of the offshore floating structure; a mooring interface configured to be attached to a lower body of the pre-laid mooring system; and a locking mechanism fluid-dynamically actuated to couple and decouple the base structure from the mooring interface, wherein the locking mechanism comprises: a grooved surface formed in the mooring interface; locking claws movably mounted on the base structure; and a fluid-dynamic device associated to the base structure and operatively connected to move the locking claws between a release position in which the locking claws are withdrawn from the grooved surface of the mooring interface and a lock position in which the locking claws are meshed with the grooved surface of the mooring interface; characterized in that each locking claw is included in a locking assembly and is guided to slide at least partially perpendicular to the longitudinal axis, wherein the quick connector further comprises wedges configured to be mounted to the base structure so as to move at least partially parallel to the longitudinal axis, wherein the fluid-dynamic device is operatively connected to lower down and raise up the wedges, wherein each wedge comprises at least one expansion wedge surface and at least one retraction wedge surface, wherein each locking assembly comprises at least one expansion inclined surface (17, 21, 22, 48) and at least one retraction inclined surface (28, 30), wherein the at least one expansion wedge surface is configured and arranged to interact with the at least one expansion inclined surface (17, 21, 22, 48) of the locking assembly and the at least one retraction wedge surface is configured and arranged to interact with the at least one retraction inclined surface (28, 30) so as to move the locking claws outwards and inwards. a base structure configured to be coupled to an upper body of the offshore floating structure; a mooring interface configured to be attached to a lower body of the pre-laid mooring system; and a locking mechanism fluid-dynamically actuated to couple and decouple the base structure from the mooring interface, wherein the locking mechanism comprises: a grooved surface formed in the mooring interface; locking claws movably mounted on the base structure; and a fluid-dynamic device associated to the base structure and operatively connected to move the locking claws between a release position in which the locking claws are withdrawn from the grooved surface of the mooring interface and a lock position in which the locking claws are meshed with the grooved surface of the mooring interface; characterized in that each locking claw is included in a locking assembly and is guided to slide at least partially perpendicular to the longitudinal axis, wherein the quick connector further comprises wedges configured to be mounted to the base structure so as to move at least partially parallel to the longitudinal axis, wherein the fluid-dynamic device is operatively connected to lower down and raise up the wedges, wherein each wedge comprises at least one expansion wedge surface and at least one retraction wedge surface, wherein each locking assembly comprises at least one expansion inclined surface (17, 21, 22, 48) and at least one retraction inclined surface (28, 30), wherein the at least one expansion wedge surface is configured and arranged to interact with the at least one expansion inclined surface (17, 21, 22, 48) of the locking assembly and the at least one retraction wedge surface is configured and arranged to interact with the at least one retraction inclined surface (28, 30) so as to move the locking claws outwards and inwards.