These features are needed by dace and barbel for successful spawning, and prevent young fish from being washed downstream in flood conditions.
Native species of fish found in this stream include Brown Trout, Chub, Dace, Roach, Pike, Millers Thumb (European Bullhead), Brook Lamprey, Gudgeon, Stone Loach and Minnow.
The long-snout dace (Leuciscus oxyrrhis) is a putative species of cyprinid fish, found in the Garonne drainage in France.