The term fish applies to any aquatic vertebrates covered with scales. They arose in the Ordovician period, 450 million years ago, and continue to thrive into the present and beyond.
Classification[]
- Animal
- Vertebrate
- Fish
- Cartilaginous Fish
- Shark
- Cretaceous Fish
- Sarcopterygian
- Cartilaginous Fish
- Fish
- Vertebrate
Gallery[]
Wikipedia has a more detailed and comprehensive article on Fish! |