catfish whiskers are sensory organs. if i recollect properly, they assist in smell and touch during their foraging for food. i have a gut feeling that such an organ might not be a simple as a fin, when it comes to regeneration. i think it will certainly heal and the wound will close, but i'm wondering if it will actually grow back and look normal. AI kind of have my doubts. good luck with that and keep up posted on your efforts and progress.