Total species range is highly variable for marine mammal species. The dugong is an endangered marine mammal related to the manatee. Examination of other marine mammal species supports this. The dugong is the only strictly herbivorous marine mammal. A mongoose is a small terrestrial carnivorous mammal belonging to the family Herpestidae. Rodents make up 40% of the mammal species. About 130 species of land mammal occur in Japan. The blue whale is the largest mammal. Insect, invertebrate, fish, mammal, and bird diversities are also expanded. The largest land mammal extant today is the African bush elephant. It is a mammal and a herbivore. Sea otters have the thickest fur of any mammal. The state marine mammal is the orca. "Thalassocnus" were found in formations with large marine mammal and shark assemblages. The red squirrel is the national mammal of Denmark.