In this article we will discuss about Scoliodon:- 1. Introduction to Scoliodon 2. Habit and Habitat of Scoliodon 3. Geographical Distribution 4. External Structures 5. Skin 6. Muscular System 7. Skeletal Structures 8. Locomotion 9. Coelom 10. Digestive System 11. Respiratory System 12. Circulatory System 13. Arterial System 14. Venous System 15. Nervous System 16. Urinogenital System 17. Development. Contents: [...]
The below mentioned article provides a note on the evolution and classification of fishes. Fishes are generally grouped into three broad categories: the placoderms, the cartilaginous fishes and the bony fishes. The placoderms include the primitive and extinct fishes, the cartilaginous fishes comprise the elasmobranchs and the holocephali, while the bony fishes include the Actinopterygians, Crossopterygians and Dipnoans. Each of [...]
The following points highlight the four main sense organs in fishes. The sense organs are: 1. Eye 2. Ear 3. Lateral-Line System 4. Hoagland. Sense Organ # 1. Eye: The eyes of fishes are the photoreceptors to see things under water. The eyes are typically built on the principle of a photographic camera. The eye ball is composed of three [...]