Fish breathe with gills. Fish lay eggs. Fish have scales. Fish have fins. Characteristics of Amphibians Amphibians have backbones.
Amphibians are cold-blooded.
Amphibians first breathe with gills, and then they breathe with lungs. They go through metamorphosis. Amphibians lay eggs. Amphibians have smooth, moist skin. Characteristics of Reptiles Reptiles have backbones.