The São Tomé Shrew (Crocidura thomensis) is a white-toothed shrew approximately three inches long found only on São Tomé Island, São Tomé and Príncipe. It is listed as a critically endangered species due to habitat loss and a restricted range. It was discovered in 1886. The population continues to decrease, making these animals rare. Found only São Tomé Island, a small island that is actually a shield volcano that rises out of the Atlantic Ocean.

The Sao Tome Shrew is on the Critically Endangered list because not only are there few left, their habitat is progressively declining. The population continues to decrease, making these animals rare. Found only Sao Tome Island, a small island that is actually a shield volcano that rises out of the Atlantic Ocean. These little shrews are only about 3 inches long, and have white teeth (other than the standard yellow) and light bellies.