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Class osteichthyes fish - PowerPoint PPT Presentation

Fish

Fish. Date back 425-500 million years ago. Early fish were called Ostracoderms and were slow, bottom-dwelling animals covered with thick, bony plates and scales. Believed to be the first animal with a backbone. Two (2) groups evolved from the Ostracoderms that exist today:

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Class osteichthyes fish - PowerPoint PPT Presentation

Fish