Threeline damsel
- kingdom: Animalia
- phylum: Chordata
- class: Actinopterygii
- order: Perciformes
- family: Pomacentridae
- genus: Pomacentrus
- species: Pomacentrus trilineatus
Al Ghardaqah
Red Sea
Egypt
Kalmunai- Trincomalee
Eastern Province- Galle
Southern
Sri Lanka