Johnius
| Johnius | |
|---|---|
| Bearded croaker (Johnius amblycephalus) | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Acanthuriformes |
| Family: | Sciaenidae |
| Genus: | Johnius Bloch, 1793 |
| Type species | |
| Johnius carutta Bloch, 1793 | |
| Synonyms | |
Johnius is a genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. They are commonly known as croakers due to their ability to produce purring, croaking and knocking sounds. The sounds are produced mainly at night and are thought to be either involved in defense or for courtship.