| Aquatic vertebrates | Terrestrial vertebrates |
| -Body weigh supported by water | -Body weigh support by limb with strong muscle |
| -No limb and strong muscle necessary | -Limb and strong muscle necessary |
| -Less energy required for support | -More energy required for support |
| -Appendages in forms of fin rays | -Appendages in form of limb |
| -pelvic girdle does not connected to vertebral column | -pelvic girdle connected to vertebral column |
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