Clownfish or anemonefish are fishes from the subfamily Amphiprioninae in the family Pomacentridae. Thirty species are recognized, one in the genus Premnas, while the remaining are in the genus Amphiprion.
97. Clownfish:'Bizarrely, all clownfish are born male. But as they grow and establish hierarchies, the dominant male switches sex to become female.' Read more in 100 Bizarre Animals www.bradtguides.com