A fishing protector and a method for use of the fishing protector at or near the sea bed by long-line fishing is provided to avoid that the catch is eaten by sea mammal when the line with the catch is hauled into a fishing boat. A gliding stopper is fastened at the termination of the line and thereafter the fishing protector is hooked on the line during the setting out of the line such that the line passes through the fishing protector. By hauling of the line the line is passing through the fishing protector and the catch is hooked off inside the fishing protector. An opening and closing mechanism at a first termination of the fishing protector closes the opening through which the fish passed, avoiding fish to escape.