An amphibian lives both in and out of the water and has slippery, moist skin. The slipperiness is due in part to mucus that the amphibian secretes in order to protect its skin.Continue Reading
An amphibians skin has many other purposes. One of the reasons it is delicate is because an amphibian breathes through its skin. The skin is permeable to water, which means than it is absorbent. The skin even produces toxins, which is deadly in some species. The American bullfrog and toad both produce toxins. The toxins in the American bullfrog are not deadly, just distasteful to predators. The American toad contains toxins in its warts, which if digested can cause death.
An amphibian goes through a process called metamorphosis over the course of its life. This means that when eggs hatch the babies look nothing like the adults. For instance, a tadpole has a tail and lacks the four legs of adult frogs. Eventually the amphibian changes through its three-stage life cycle to resemble other adults of its species. The three stages include egg, larva and adult.
Amphibians are divided into three groups: frogs and toads, newts and salamanders and caecilians. Caecilians resemble snakes or eels with no arms or legs and only a tail. The largest amphibian is the Chinese giant salamander, growing up to 6 feet long.Learn more about Amphibians