Theo take a look at this wrt your question.

 Quote:
Originally posted by Theo Gallus:
What all should GeeDub be checking for possible morphological evaluation?

-Hard Spine numbers (dorsal fin)
-Soft Ray numbers (dorsal fin, anal fin, ???)
-Pharyngeal teeth on tongue

What else?
Look at this FishBase ID system for factors to look for in fish ID.

Morphology Data

http://www.fishbase.org/physiology/Morph...us&autoctr=2121