Taxonomy of Finfish

2.3.12 Morphology and morphometric measurements of rays

For rays, the following measurements should be recorded:

1. Preorbital length – Distance between snout to orbit
2. Postorbital length of disc – Distance between posterior part of orbit to anus
3. Body depth – Maximum distance across the body
4. Tail length – Distance between anus to the tip of posterior part of tail. The other characters are similar to that of sharks and bony fishes.