Only about 4 percent of animal species are vertebrates. The rest are invertebrates. The number of vertebral bones varies from fewer than 10 in frogs to more than 70 in the deep-sea snipe eel.
1. Fish - regal tang
2. amphibians - poison dart frog
3. reptiles - savana monitor lizard
4. birds - pigeon
5. mammals - black panther
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