When hammer coral says, 鈥渘ew year, new me鈥, it truly means it: many colonies of the coral species change their sex annually. The pattern seems to be a first among animals.
In 2011, at the National Taiwan Ocean University and his colleagues were surveying hammer corals (Fimbriaphyllia ancora) in the tropical West Pacific Ocean. The researchers discovered that many of the colonies had changed sex since the previous year.
At…