Coelacanthus
| Coelacanthus Temporal range:  | |
|---|---|
| Coelacanthus granulatus fossil | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Clade: | Sarcopterygii | 
| Class: | Actinistia | 
| Order: | Coelacanthiformes | 
| Family: | †Coelacanthidae | 
| Genus: | †Coelacanthus Agassiz, 1839 | 
| Species: | †C. granulatus | 
| Binomial name | |
| †Coelacanthus granulatus Agassiz, 1839 | |
Coelacanthus, from Ancient Greek κοῖλος (koîlos), meaning "hollow", and ἄκανθα (ákantha), meaning "spine", is a genus of extinct marine coelacanths known from the late Permian period. It was the first genus of coelacanths described, about a century before the discovery of the extant coelacanth Latimeria. The order Coelacanthiformes is named after it.