Crimsonspotted Rainbowfish
Melanotaenia duboulayi
- Least concern
- Card rarity: Common
- Fish

Melanotaenia duboulayi, the crimson-spotted rainbowfish, less commonly known as the Duboulay's rainbowfish, is a species of freshwater fish endemic to coastal eastern Australia, although M. duboulayi has also been kept as an aquarium fish since the early 20th century, and is the original "Australian rainbowfish".
Classification
- Class
- Actinopterygii
- Order
- Atheriniformes
- Family
- Melanotaeniidae
- Genus
- Melanotaenia