299 million years ago all animals were aquatic. After 299 million many animals chose to conquer the land. Many of them evolved into lizard-like creatures, and most of them were amphibians.
For example, the original water scorpion salamander feeds on fish, but does not live in water, it breathes with lungs, and is one of the earliest animals to breathe with lungs.
Proto-water scorpion salamander
Animal legs evolved from the fins of fish, and the earliest animals to evolve legs were tetrapods with four legs and toes at the ends of each leg. Fishstone salamander-like toes are even as many as eight! Terrestrial animals absorb oxygen directly from the air, rather than relying on gills to draw oxygen from the water like fish, some early fish evolved lung structures to help them breathe air on the surface of the water, and some fish retained their lungs, which played a crucial role when they began to make gradual landfall, including lungfish among the earliest fish that landed more than 400 million years ago.
Amphibians ↓
Amphibians are animals that live partly in the water and on land part of the time, with fins that gradually evolve into legs that allow them to walk on land, amphibians are the earliest tetrapods, they are the ancestors of all living tetrapods, all of them are their descendants. For example, sticky salamanders, salamanders and salamanders.
Fishstone salamander
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