| Named By: | G. M. Bernacsek & D. L. Dineley in 1977 |
| Time Period: | Lochkovian of the Devonian |
| Location: | Canada, Northwest Territories - Delorne Formation |
| Size: | Individuals range between 6 and 10 centimetres long |
| Diet: | Carnivore |
| Fossil(s): | Numerous individuals, many of which are complete and articulated |
| Classification: | | Chordata | Acanthodii | Climatiiformes | Diplacanthidae | |
Gladiobranchus is a genus of Acanthodiian fish that lived in the waters of what is now Canada during the Devonian period.