Amphibians are tetrapod animals from the class Amphibia comprising toads, frogs, salamanders, newts and caecilians. They have an amphibious lifestyle, where the larvae are aquatic. Skin is generally soft and with glands. They show three type of respiration through moist skin, buccal cavity and lungs. Caecilians are limbless amphibians, whereas other amphibians have short limbs. Amphibians lay cluster of eggs as egg masses closer to a water body and show an external fertilization.