Halicyclops is a genus of copepods belonging to the family Cyclopidae. There are currently 94 described species found in brackish habitats throughout the world: * C. E. F. Rocha, 1983 * (Fischer, 1860) * Kiefer, 1967 * Herbst, 1983 * Bozic, 1964 * Ueda & Nagai, 2009 * Lindberg, 1952 * C. E. F. Rocha & Iliffe, 1993 * Herbst, 1952 * Karanovic, 2006 * Fiers, 1995 * (Bourne, 1890) * Lindberg, 1941 * Humes, 1947 * C. E. F. Rocha, Iliffe, Reid & Suárez-Morales, 1998 * Herbst, 1982 * Ueda & Nagai, 2009 * Herbst, 1977 * Herbst, 1955 * Monchenko, 1979 * Petkovski, 1955 * Brownell, 1983 * Kiefer, 1960 * C. E. F. Rocha, 1995 * De Laurentiis, Pesce & Humphreys, 2001 * Lindberg, 1943 * Kiefer, 1934 * M. S. Wilson, 1958 * Plesa, 1961 * Suárez-M