Extinct genus of ray-finned fishes
Canobius (named for Canobie, the district where it was discovered) is an extinct genus of marine ray-finned fish that lived in the early Carboniferous period (Viséan) of Glencartholm, Scotland. 
Two species are known from fossil specimens:
Potential indeterminate remains are known from the Tournaisian of Newfoundland and Labrador, Canada. Many other species were previously referred to this genus, but have since been reclassified.
"Canobius" was a small fish, in length. Compared with its earlier relatives, it had specialized jawbones and hyomandibulars which attached the upper jaw to the braincase, meaning that the jaws were hung vertically under the braincase. This allowed "Canobius" to open its jaws wider and expand its gill slits further at the same time. In turn, this meant that the fish could take in more oxygen, making it a more active creature. "Canobius" is presumed to have fed on plankton which is filtered from the water using its small teeth and gills.
References.
 ;templatestyles src="Reflist/styles.css" / ;