The earliest amphibians evolved in the Devonian period from sarcopterygian fish with lungs and bony-limbed fins, features that were helpful in adapting to dry land. ... The number of known amphibian species is approximately 8,000, of which nearly 90% are frogs.

What did frogs evolve from?

When did frogs evolve? Frogs developed out of lungfish about 375 million years ago, in the Devonian period. They used their lungs to leave the water and live on land.

Is a frog related to a fish?

Vertebrates. Both frogs and fish belong to the phylum Chordata and the subphylum Vertebrata. This means that both frogs and fish have a spinal cord and backbone. ... Frogs and fish share these traits with other vertebrates, like mammals and reptiles.