Sentences with phrase «predatory placoderms»
Before the extinction, fish were dominated by two groups: the armor - plated, predatory placoderms and the lobe - finned fish, whose fins are borne on a fleshy, scaly stalk extending from the body.
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Dunkleosteus grew up to 33 feet long and was the largest of a group of armor - plated predatory fish, the placoderms.