sentence: Some fish change sex over the course of their life.
sentences_after: This phenomenon is called 'sequential hermaphroditism'. In clownfish, smaller fish are male, and the dominant and largest fish in a group becomes female. Sequential hermaphrodites may produce both types of gametes over the course of their lifetime, but at any given point they are either female or male.
concept_name: fish
headings: Sex Sex determination Nongenetic
categories: Biological reproduction