Definitions for water shrew
any of several small semiaquatic shrews usually living near swift-flowing streams
Any of the small insectivores of the genus Neomys in the Soricidae family. There are three species, the "Eurasian water shrew" (also known as European water shrew) Neomys fodiens, the "Mediterranean water shrew" Neomys anomalus and the "Transcaucasian water shrew" Neomys teres.
any one of several species of shrews having fringed feet and capable of swimming actively. The two common European species (Crossopus fodiens, and C. ciliatus) are the best known. The most common American water shrew, or marsh shrew (Neosorex palustris), is rarely seen, owing to its nocturnal habits