Discovery Fit & Health
There are two types of hermaphrodites in the animal and plant world. Simultaneous hermaphrodites maintain both the male and female reproductive system throughout their entire lives, while sequential hermaphrodites change between the sexes. Most species will only change once, but there are some species that change numerous times. The hamlet, a type of tropical fish, can shift back and forth between the sexes in just 30 seconds. That speed comes in handy during the hamlet's marathon sex sessions; hamlets spawn an average of 14 times in one day, according to the National Zoo.
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