Differentiate between chondrichthyes and osteichthyes.
|Endoskeleton||Commonly known as cartilaginous fish as they have cartilaginous endoskeleton||Commonly known as bony fish as they have bony endoskeleton|
|Body size||Large-sized fish||Comparatively smaller in size|
|Mouth position||Ventral||Terminal (anterior)|
|Type of scale present on skin||Placoid scales||Scales absent, if present, cycloid scales|
|Number of gills present||5-7 pairs of gills, not covered by operculum||4 pairs of gills, covered by operculum|