![]() The two large fish are the only sexually mature fish and are a male and female breeding pair. This species lives within sea anemones in groups of two large fish and many small fish. Clownfish, photo from Wikipedia user Metatron and licensed via Creative Commons Ĭlownfish (like Nemo from the Pixar movie) are protandrous. In some sequentially hermaphroditic fish species, animals develop first as male and then switch to female (a condition called protandry), and in others, the individuals develop first as female and then switch to male (protogyny). This is known as sequential hermaphroditism, contrasting with simultaneous hermaphroditism, in which the animal can produce sperm and eggs at the same time. In some hermaphrodites, the animal starts out as one sex and switches to the other sex later in its life. A hermaphrodite is an organism that has both male and female reproductive organs and can perform both the male and female parts of reproduction. ![]() However, in a few vertebrates like fishes (and in plants and many invertebrate animals), a condition called hermaphroditism is common. In most vertebrate animals, the sex of an individual is permanent and is determined at the moment of conception. Information on controversies in the public arena relating to evolutionĪre you a boy or a girl? That seems like an easy question to answer, but for some fishes - such as the clownfish, a member of the clade called Perciformes (PER-suh-FOR-meez) - it’s not so straightforward.Alignment with the Next Generation Science Standards.The big issues – Pacing, diversity, complexity, and trends.Macroevolution – Evolution above the species level.Microevolution – Evolution within a population.Mechanisms: the processes of evolution – Selection, mutation, migration, and more.The history of life: looking at the patterns – Change over time and shared ancestors.An introduction to evolution: what is evolution and how does it work?.
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