Photographs displaying physical features of the surveyed caves and associated rivers/streams A Gabinarraca cave entrance, showing the outflow of water into Quebrada El Túnel B inside Gabinarraca cave while electrofishing C Quebrada El Túnel close to the entrance of Gabinarraca cave D Corredores cave entrance E Río Corredor as seen from the cave entrance higher up F Río Corredor riverbed at a small canyon on the way to the cave access point.