Firefighters rescued a dog that had fallen into Barkers Lock in Ilkeston.
A crew attended the incident on Awsworth Road just after 8.45pm on Thursday.
The three-year-old greyhound called Rita had fallen into the lock but was safely rescued and returned to its owner.
Derbyshire Fire and Rescue Service tweeted: "Rita’s owner rang for assistance knowing it was too dangerous to attempt a rescue himself. Thankfully Rita is on the mend with no lasting injuries."