Sequential hermaphroditism
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Sequential hermaphroditism is one of the two types of hermaphroditism, the other type being simultaneous hermaphroditism. It occurs when the organism's sex changes at some point in its life. A sequent
Ocellaris clownfish, Amphiprion ocellaris, a protandrous sequential animal species
Lysmata, a genus of shrimp that performs protandric simultaneous hermaphroditism
Moon wrasse, Thalassoma lunare, a protogynous animal species
A terminal-phase male bluehead wrasse
Dioecy
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Dioecy is a characteristic of species that have distinct unisexual individuals, each producing either male or female gametes, either directly or indirectly. Dioecious reproduction is biparental reprod
Sequential hermaphroditism
…Their analysis supports the size-advantage model and suggest that sequential hermaphroditism is correlated to the size-advantage. They determined that dioecy was less likely to occur when the size advantage is stronger than other advantages. Warner suggests that selection for protandry may occur in populations…
In dioecious holly, some plants only have 'male' flowers with stamens producing pollen.
Other holly plants only have 'female' flowers that produce ovules.