Sea life

All kinds of animals that live in the water, such as oceans, seas, rivers and lakes

Extinct Sharks Species

Extinct Sharks

Extinct Sharks The first sharks appeared in the Devonian, about 420 million years ago. From the Cretaceous 100 million years ago, many species of sharks adopted their modern form. Since then, there have been around 500 species of sharks grouped into 35 families. Sharks breathe through five to seven-gill slits. In general, the more primitive …

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