A type of fish spawning area associated with flowing water and clean gravel Fishes that utilize this type of spawning area include trout, salmon, some minnows, etc
The terms redd and redd up came to the American Midlands from the many Scottish immigrants who settled there. Meaning "to clear an area or to make it tidy," redd is still used in Scotland and Northern Ireland; in the United States it is especially common in Pennsylvania as the phrasal verb redd up. The term, which goes back to Old Norse rydhja, can be traced from the 15th century to the present, particularly in dialects of Scotland and the North of England. A spawning nest made by a fish, especially a salmon or trout