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DIAGRAM OF EXTERNAL STRUCTURAL FEATURES 
1. Snout 8. Ventral line 
1-4. Profile 9. Dorsal line 
2. Cheek-bone (preopercle) 10. First dorsal fin 
3. Gill-cover (opercle) 11. Second dorsal fin 
4. Nape 12. Ventral fin 
5. Shoulder 13. Anal fin 
5-6-7. Lateral line 14. Caudal fin 
7. Base of caudal fin 15. Pectoral fin 
