Charles Tate Regan, Fellow of the Royal Society (1 February 1878 – 12 January 1943) was a British ichthyologist, working mainly around the beginning of the 20th century. He did extensive work on fish classification schemes.
Born in Sherborne, Dorset, he was educated at Derby School and Queens' College, Cambridge and in 1901 joined the staff of the Natural History Museum, where he became Keeper of Zoology, and later director of the entire museum, in which role he served from 1927 to 1938.
Regan was elected Fellow of the Royal Society in 1917.
Regan mentored a number of scientists, among them Ethelwynn Trewavas, who continued his work at the British Natural History Museum.
Regan, Charles Tate. 1903. "Descriptions de poissons nouveaux faisant partie de la collection du Musée d'Histoire Naturelle de Genève". Revue Suisse de Zoologie. 11(2):413-418 (ffm00158)
Regan, Charles Tate. 1903. "Descriptions of new South-American fishes in the collection of the British Museum". Annals and Magazine of Natural History. 12(72):621-630 (ffm00544)
Regan, Charles Tate. 1903. "On a collection of fishes made by Dr. Goeldi at Rio Janeiro". Proceedings of the Biological Society of London. 2(1):59-6 (ffm00512)
Regan, Charles Tate. 1904. "Descriptions of new or little-known fishes from Mexico and British Honduras". Annals and Magazine of Natural History. (Ser7)13:255-259 (ffm00273)
Regan, Charles Tate. 1904. "Descriptions of Holocentrum osculum Poey, and of a new fish of the genus Centropomus". Annalen des Wiener Museums der Naturgeschichte. 13(73):259-261 (ffm00554)
Regan, Charles Tate. 1905. "A collection of fishes made by Dr. H. Gadow in southern Mexico". Annals and Magazine of Natural History. 16(93):361-363 (ffm04588)
Regan, Charles Tate. 1905. "A revision of the fishes of the American cichlid genus Cichlosoma and of the allied genera". Annals and Magazine of Natural History. (Ser7)16:60-77; 225-243; 316-340; 433-445 (ffm00042)
Regan, Charles Tate. 1907. "Descriptions of six new freshwater fishes from Mexico and Central America". Annals and Magazine of Natural History. [Series 7]:19(109):258-260 (ffm01141)
Regan, Charles Tate. 1907. "Diagnoses of new Central-American freshwater fishes of the families Cyprinodontidae and Mugilidae". Annals and Magazine of Natural History. 19(109):64-66 (ffm00054)
Regan, Charles Tate. 1908. "Description of a new fish of the genus Cichlosoma from Tampico, with notes on some other fishes from Mexico and the Caribbean Sea". Annals and Magazine of Natural History. (Ser8)222-223 (ffm00257)
Regan, Charles Tate. 1909. "A revision of the fishes of the genus Elops". Annals and Magazine of Natural History. 3(13):37-40 (ffm00556)
Regan, Charles Tate. 1909. "Descriptions of three new freshwater fishes from South America, presented to the British Museum by Herr J. Paul Arnold". Annals and Magazine of Natural History. (Ser8)234-235 (ffm00160)
Regan, Charles Tate. 1910. "The origin and evolution of the teleostean fishes of the order Heterosomata". Annals and Magazine of Natural History. 8(35):484-496 (ffm00860)
Regan, Charles Tate. 1911. "On some fishes of the family Poeciliidae". Annals and Magazine of Natural History. 8(45):373-374 (ffm00056)
Regan, Charles Tate. 1913. "A revision of the cyprinodont fishes of the subfamily Poeciliinae". Proceedings of the Zoological Society of London. 1913:977-1018 (ffm00016)
Regan, Charles Tate. 1914. "Description of a new cyprinodont fish of the genus Mollienisia from Yucatan". Annals and Magazine of Natural History. 13(75):338 (ffm00024)
Regan, Charles Tate. 1914. "Descriptions of two new cyprinodont fishes from Mexico, presented to the British Museum by Herr A. Rachow". Annals and Magazine of Natural History. 14(79):65-67 (ffm04568)
Regan, Charles Tate. 1922. "The Classification of the Fishes of the Family Cichlidae.--II. On African and Syrian Genera Not Restricted to the Great Lakes". Annals and Magazine of Natural History. 9(10):252 (ffm00812)