Scientists have for the first time closely studied how the small fish species Parakneria thysi climbs a 15-meter-high waterfall in Congo-Kinshasa. During the rainy season from April to May, thousands of these fish undertake a dramatic journey up the Luvilombova waterfall by attaching to vertical rock walls and using their fins in explosive movements. The arduous climb takes ten hours and is risky, as fish can fall if hit by strong water currents, especially when hanging upside down under overhanging ledges.
The study is published in Scientific Reports.