Water Rat

Water Rat(s) may refer to:

Animals
Water Rat is a common name for several unrelated semi-aquatic rodents, including: European Water Vole, found in north and central Europe and Russia
Rakali, found throughout Australia and New Guinea
Round-tailed Muskrat, found in the United States
Nectomys, found in South America
Amphinectomys savamis, found in Peru
Other
Water Rats (TV series), an Australian police procedural drama originally airing from 1996 to 2001 and focusing on the Sydney Water Police
The Grand Order of Water Rats, an entertainment industry charity based in London, England
The Rat zodiac sign is associated with the element of water
The nickname of the 3rd Canadian Infantry Division