Question

What are 3 examples of cartilaginous fish?

Answer 1

Chondrichthyes:

1. It is referred to as the class of jawed fishes having a cartilaginous skeleton.
2. Their mouth is present ventrally.
3. Their skin is covered in minute tooth-like structures known as placoid scales.
4. Their teeth are also modified placoid scales and are not attached to their jawbones.
5. They are present simply embedded in the tissue.
6. They have around 5-7 pairs of gills. Gaseous exchange occurs through the water current which is passing over the gills.
7. Examples: Scoliodon (Dogfish), Rhincodon (Whale shark), Trygon (Stingray), Torpedo (Electric ray).