Once a small fish gets swallowed by a predator its over, right? Not if you are a japanese eel Anguila japonica! Scientists captured impressive x-ray footage how in some cases little eels wiggle their way back out of the stomach of the predatory fish Odontobutis obscura. Almost one third of the observed eels managed to escape through the gills. However, they have to be quick. The acidic conditions in the digestive tract of the predator will kill them within a few minutes.