 In the Banggai cardinalfish, courtship behavior is usually initiated by the female.Upon choosing a mate, the female isolates her potential mate from other individuals in the colony by creating a spherical spawning site that is about 50–60 cm in diameter.The general movement that the female exhibits is called‘side by side trembling’ which is when the female approaches the male from behind with a vigorous trembling motion while the male stays motionless.