The pic isn't very sharp (due to my using a low shutter speed when the skin was vigorously flapping in the current), but if you look carefully, you can still see the tubercles on 'em.

Asian banjos and sisorids (especially <i>Glyptothorax</i> ) do shed their skin, pretty much the same way as banjo cats (indicative that they are closely related).Question for you: do the Asian Banjo's shed their skin? or the very banjo-like Chaca?