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20. How are rayfinned fishes different from fleshy finned fishes? What were distal phalanges probably first...

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Biology

20. How are rayfinned fishes different from fleshy finnedfishes? What were distal phalanges probably first used for?

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Ray finned fish The rayfinned fish have fin rays with fins supported by bony spines known as rays The rayfinned fish are the dominant class of vertebrates with nearly 99 of fish falling into this category They live in all aquatic environments from freshwater and marine environments from the deep sea to the highest mountain streams Rayfinned fishes are so called because they possess lepidotrichia or fin rays their fins being webs of skin supported by bony or horny spines rays as opposed to the fleshy lobed fins that characterize the class Sarcopterygii These actinopterygian    See Answer
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