Tag: bony fishes

Bony Fishes Cartilaginous Fishes Marine and Freshwater both Mostly marine Usually bilaterally flattened Usually dorsoventrally flattened Mouth is terminal on head Mouth is mostly ventral External nares are dorsal External…

Small order of freshwater bony fishes.Dipnoi (Gr. di-two, pnoe-breathing) is a small order of fresh water bony fishes.They respire by gills and lungs.Dipnoi evolved during Devonian period.They are characterized by…

These are true, jawed vertebrates with specific organs for respiration, excretion and blood circulation. The organisms belonging to this class are poikilotherms, meaning that they cannot regulate their own body…