Rainbow Darter
Etheostoma caeruleum
- Least concern
- Card rarity: Common
- Fish

The rainbow darter is a small species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is native to North America where it is found in small, fast-moving streams and small to medium-sized rivers. It grows to 2 to 3 inches in length. The species is very sensitive to pollution and silt, staying in clean, pollution-free water. The rainbow darter is easily identified by three dark spots on the back, and blue and orange in the dorsal and anal fins.
Classification
- Class
- Actinopterygii
- Order
- Perciformes
- Family
- Percidae
- Genus
- Etheostoma