Mouth profile
![](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Fahrrad-ostern-2006-bluefish-15.jpg/220px-Fahrrad-ostern-2006-bluefish-15.jpg)
The flow of the Ragöse, built as a mouth profile, through the Ragöser Damm
A mouth profile is a specially shaped pipe cross-section that simulates the shape of a fish's mouth. Channel profiles, for which egg , circular and rectangular profiles are common in addition to mouth profiles, are described in DIN 4263. The mouth profile combines the property of a low overall height with a large flow rate, but has hydraulic disadvantages.