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Arthropods are the phylum with the largest number of species.
Most hermaphroditic species exhibit some degree of self-fertilization.
For instance, groupers are favoured fish for eating in many Asian countries and are often aquacultured.
Since the adults take several years to change from female to male, the broodstock are extremely valuable individuals.
Hermaphroditism is also found in some fish species and to a lesser degree in other vertebrates. Historically, the term hermaphrodite has also been used to describe ambiguous genitalia and gonadal mosaicism in individuals of gonochoristic species, especially human beings.
The word intersex has come into preferred usage for humans, since the word hermaphrodite is considered to be misleading and stigmatizing, Since the estimated total number of animal species is 8.6 million, the percentage of animal species that are hermaphroditic is about 0.7%.
which derives from Hermaphroditus (Ἑρμαφρόδιτος), the son of Hermes and Aphrodite in Greek mythology.
The apparent penis in female spotted hyenas is in fact an enlarged clitoris, which contains an external birth canal.
It can be difficult to determine the sex of wild spotted hyenas until sexual maturity, when they may become pregnant.
Sequential hermaphroditism is common in fish (particularly teleost fish) and some jellyfish, many gastropods (such as the common slipper shell), and some flowering plants.
Sequential hermaphrodites can only change sex once.
Some people who are intersex, such as some of those with androgen insensitivity syndrome, outwardly appear completely female or male, frequently without realizing they are intersex.