Fin stabilizer, covering element and water vehicle

A fin stabilizer configured to stabilize a watercraft, the fin stabilizer including:

• a housing defining a receiving space and an opening into the receiving space;
• a pivotable stabilizer fin;
• the pivotable stabilizer fin being shiftable from a retracted state in which the pivotable stabilizer fin is received in the receiving space to an extended state in which the pivotable stabilizer fin extends from the receiving space;
• and
• an at least one cover element that at least partially closes an opening of the receiving space, through which opening the pivotable stabilizer fin enters and exits the receiving space during retracting and extending, respectively,
• wherein the at least one cover element is flexible, and
• wherein the pivotable stabilizer fin does not contact the at least one cover element when shifting from the retracted state to the extended state.