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Notes On Pisces

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Published in: Biology
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CHARACTERISTICS OF PISCES

Fatima J / Hyderabad

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  1. CHARACTERISTICS OF PISCES 1. They are cold blooded. 2. They are first jawed animals. 3. They are vertebrates. 4. Body is usually streamlined. 5. Their body is differentiated into head, trunk and tail. 6. They are aquatic. 7. They do not have eyelids. 8. External and middle ear is absent. Only inner ear is present. 9. Fins are locomotory organs. They respire through gills. Heart is two chambered. Circulation is unicircuit. RBCs are nucleated. There are 10 pairs of cranial nerves. Body is covered with waterproof dermal scales. 10. 11. 12. 13. 14. 15. 16. 17. 18. Sexes are separate. Fertilization is internal or external. Endoskeleton is cartilaginous and bony. * •mon