Question

Some fishes do not have bone. Then what are made up of ? Can you name some?

Answer 1

$<i>$It is correct that some fishes do not have bones. They are made up of cartilage.

They have cartilaginous endoskeleton.

These types of fishes are under the 'chondrichthyes' class.

For example :

Scoliodon, Pristis, Trygon, etc.