Over millions of years, fish species evolved to leave water and survive on land, producing the characteristics shared by all amphibians.
- The coelacanth is a lobe-finned fish that evolved 400 million years ago.
- The coelacanth's fins are strong, long and move like legs.
- Two key adaptations enabled early fish to live on land: limbs and the ability to breathe air.
- 360 million years ago, lobe-finned fish developed four distinct limbs to become tetrapods – the first amphibians.