Differentiate between chondrichthyes and osteichthyes

Differentiate between chondrichthyes and osteichthyes.

Characteristics Chondrichthyes 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
Caudal fin Heterocercal Homocercal
Excretory waste Urea Ammonia