Armored catfishes (Loricariidae) are known to exhibit terrestrial behaviors, but these have been poorly described. The goals of this study are to describe (1) the terrestrial locomotion of 4 loricariid species (3 Pterigoplichthys, 1 Hypostomus), (2) how their armored morphology may affect terrestrial locomotion, and (3) how behavior, performance, and kinematics relate to species and endurance. The terrestrial locomotion of the 4 species was recorded using high-speed cameras. Videos were digitized in MATLAB and ImageJ to compare performance and kinematics between species and subsequent locomotor sequences. Morphology was described using &microCT scans and dissections. Loricariids use a novel, highly asymmetric form of axial-appendage-based terrestrial locomotion involving their mouth, paired fins, posterior axial body, and tail. As this behavior is so unlike any other described locomotor behavior, we have created a new word to describe it: reffling. These species have numerous unique morphological traits that may greatly reduce body and fin flexibility. Because loricariids are so inflexible, they may be constrained into reffling as their only means of terrestrial locomotion, but their stiffness may improve force transmission, allowing them to be among the fastest fishes on land. Overall, all 4 species had very similar terrestrial kinematics and performance. Their performance generally declined over time, but different species had different endurance levels. Because many loricariid species are invasive throughout the world, it is important to consider their capacity to disperse into new bodies of water overland in management plans and risk assessments.