Halfmoon Triggerfish
Rhinecanthus lunula
- Least concern
- Card rarity: Common
- Fish

Rhinecanthus lunula, commonly known as the halfmoon picassofish, is a species of balistid triggerfish first described by John E. Randall and Roger C. Steene in 1983. It belongs to the Indo-Pacific triggerfish genus Rhinecanthus.
Classification
- Class
- Actinopterygii
- Order
- Tetraodontiformes
- Family
- Balistidae
- Genus
- Rhinecanthus