Tomato clownfish (Amphiprion frenatus)

This group of fish has interesting biology. In a group of anemonefish, a strict dominance hierarchy exists. The largest and most aggressive female is found at the top. Only two anemonefish, a male and a female, in a group reproduces – through external fertilization. Anemonefish are protandrous sequential hermaphrodites, meaning they develop into males first, and when they mature, they become females. If the female anemonefish is removed from the group, such as by death, one of the largest and most dominant males becomes a female. The remaining males move up a rank in the hierarchy. Clownfish live in a hierarchy, like Hyenas, except smaller and based on size, not gender, and order of joining/birth. In a clownfish anemone, only two clownfish get to mate, the male and the female. The other clownfish do not breed unless the female dies; one becomes the dominant male, while the old dominant male becomes the new breeding female (read more at https://en.wikipedia.org/wiki/Clownfish) Location: Binduyan, Puerto Princesa City, Palawan, Philippines