Climbing behavior of Cordylancistrus sp. in the Colombian Andes

The climbing behavior in a suckermouth Loricariidae catfish species is reported for the first time. A group of eight specimens of Cordylancistrus sp. were observed in situ climbing a waterfall in a mountain stream of the Colombian Andes. This study describes how this species overcame the vertical barrier, and then discusses and hypothesizes how the development of "key morphological and behavioral innovations" could play an important role in the occupation of a new niche and in the diversification of the Loricariidae family.