Difference between Sharks and Rays:
1.Body is laterally compressed.
3.Distinct but not fused with the head.
4.Present but small and lateral.
7.E.g. Scoliodon and Zygaena.
1.Body is dorsoventrally flat.
3.Fused with the head but large sized.
4.Large and dorsal always present.
6.Slow swimmer fishes.
7.E.g. Torpedo, Trygon.