How many animals are hermaphrodites?
Hermaphrodite
A rough estimate of the number of hermaphroditic animal species is 65,000
A rough estimate of the number of hermaphroditic animal species is 65,000.[6] Since the estimated total number of animal species is 8.6 million, the percentage of animal species that are hermaphroditic is about 0.7%. Arthropods are the phylum with the largest number of species.  Most hermaphroditic species exhibit some degree of self-fertilization. The distribution of self-fertilization rates among animals is similar to that of plants, suggesting that similar processes are operating to direct the evolution of selfing in animals and plants.[6]