RAINBOW TROUT; TO SHOW EXTERNAL FEATURES. 



1. Lateral Line. 



2. Gill Opening. 



3. Gill Cover. 



4. Snout. 



5. Nostril. 



6. First Dorsal Fin. 



7. Second Dorsal Fin. 



8. Caudal Fin. 



9. Anal Fin. 

 10. Pelvic Fins. 



11. Pectoral Fins. 



