Water Rat

Water Rats are intelligent and excellent swimmers that swim in lakes or rivers around the world of Narnia. One Water Rat affiliates the Calormenes, where he was sent to operate a small punt with a pole, when they begin felling the Narnian trees since the end of the world was coming in The Last Battle.

However, in the beginning of the first book, The Magician's Nephew, Water Rats were present at the coronation where Frank I and Helen become the first King and Queen of Narnia.