In Arrian's "Periplus Ponti Euxini", it is called the "Acampsis" (); Pliny may have confused it with the "Bathys". Procopius writes that it was called Acampsis because it was impossible to force a way through it after it has entered the sea, since it discharges its stream with such force and swiftness, causing a great disturbance of the water before it, that it goes out for a very great distance into the sea and makes it impossible to coast along at that point.