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- A vertebra of a small ray-finned fish (en)
- Internal anatomy of a bony fish (en)
- External anatomy of a bony fish : 1. operculum , 2. lateral line, 3. dorsal fin, 4. adipose fin, 5. caudal peduncle, 6. caudal fin, 7. anal fin, 8. photophores, 9. pelvic fins , 10. pectoral fins (en)
- The X-ray tetra has a visible backbone. The spinal cord is housed within its backbone. (en)
- The deep sea half-naked hatchetfish has eyes which look overhead where it can see the silhouettes of prey. (en)
- Zenion hololepis is a small deep water fish with large eyes. (en)
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