1) Animal order 2) Batoidei 3) Order batoidei 4) Order rajiformes 1) Batoidei 
The Rajiformes are one of the four orders in the superorder Batoidea, flattened cartilaginous fishes related to sharks. Rajiforms are distinguished by the presence of greatly enlarged pectoral fins, which reach as far forward as the sides of the head, with a generally flattened body. The undulatory pectoral fin motion diagnostic to this taxon is k...
[n] - fish with dorsoventrally flattened bodies
order Rajiformes noun fish with dorsoventrally flattened bodies; includes: rays; skates; guitarfishes; sawfishes