What is any one of several species of small American cyprinodont fishes of the genus Fundulus, and of allied genera; the killifishes; -- called also minnow. [Written also mummychog, mummachog.] called?

mummichog — Any one of several species of small American cyprinodont fishes of the genus Fundulus, and of allied genera; the killifishes; -- called also minnow. [Written also mummychog, mummachog.]. (Webster's 1913.)