Johann Friedrich Theodor Müller ( 31 March 1821 - 21 May 1897 ) , better known as Fritz Müller , and also as Müller-Desterro , was a German biologist who emigrated to southern Brazil , where he lived in and near the German community of Blumenau , Santa Catarina .
Fritz Müller ( 31 March 1821 - 21 May 1897 ) , was a German biologist and doctor who went to live in southern Brazil .