Shark Summary

Everything you need to understand or teach Shark.

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1 Encyclopedia Article

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Encyclopedia Articles (1)

Sharks

1,830 words, approx. 7 pages

Sharks Sharks are eight orders of cartilaginous fishes in the class Elasmobranchii. Sharks first appear in the fossil record of about 430 million years, during the Silurian Period. The Silurian is s... Read more

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