This fish is distinctive for the long fins that extend from its slender body. These long fins are only found on males and are used in "fin spreading" displays, where males spread their fins out wide and attempt to intimidate each other. The fins of females do not expand and are more subdued in color.
- Scientific Name
- Iriatherina werneri
- Classification
- Order: Atheriniformes, Family: Melanotaeniidae
- Habitat
- New Guinea, Australia
