1. A common trait between tadpole and fish is

2. This has a cartilaginous endoskeleton

3. True fishes have fins and gills This is not a true fish

4. This fish shows dorsal fin modified into suckers

5. This is a living fossil

6. This is a migratory fish

7. The distinguishing factor between rays and sharks are

8. Type of association between shark and suckerfish is

9. Placoid scales are found in

10. This is a characteristic feature of fishes