The list of species affected by imposex comprises gastropod species in which imposex, a condition affecting female specimens due to exposure to certain compounds, was recorded since it was first observed in the late 1960's. In the late 1970's, imposex had been recognized in at least 34 species. [2] This number had increased to at least 100 species a decade later, [3] and by 1994, it had been verified in females of at least 195 species worldwide. [4] The records continued to increase to a total of 260 species in the following 15 years. [5] [6] The condition is known to affect marine, estuarine, and freshwater species from several families. [7] [8] [9]