Documents Jawless fish. Living species include lampreys and hagfish.

Jawless fish. Living species include lampreys and hagfish. Ostracoderms â armor plates of bony tissue Placoderms â mineral hardened backbone and jaw Significant because…

Documents Chapter 8 Marine Fish. Figure 8.01 Figure 8.02 Characteristics of Subphylum Vertebrata A notochord.....

Chapter 8 Marine Fish Characteristics of Subphylum Vertebrata A notochord that has developed into a spinal cord protected by vertebrae and a head with a brain characterize…