Question

give any two characteristics of Bony fish on the basis of which place in class pieces​

Answer 1

Both bony fish and cartilaginous fish breathe through gills, but bony fish also have a hard, bony plate covering their gills. This feature is called an operculum. Bony fish may also have distinct rays, or spines, in their fins.

Answer 2

they are vertebrates and cold blooded animals. they have two chambered hearts. Eg;-Lion fish(pterois volitans)