Question: how did sea creatures come onto the land

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  1. Very few vertebrates (animals with back bones) come onto land but numerous invertebrates such as shells, plants etc can tolerate being exposed at low tides. The vertebrates that come onto land as part of their normal lives include the sea turtles (8 species), some sea snakes, crocodiles and mud skippers. The need for reptiles to come on to land to lay eggs is an old evolutionary trait

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