Amphibians are also subject to many diseases. Amphibians can be harmed by many parasites. While, most of the time parasites live without harm. Massive infections over an amphibian population has been known to cause great disaster. Infestations of the parasite, Carchesium have been known to clog the gills of tadpoles, causing retardation and death.
Amphibians are prey for a great variety of predators because they are small and they have soft skin.
The predators include all classes of vertebrates and some arthropods. Some small anurans are even prey to the plant specie, Venus flytrap. Aquatic eggs of amphibians are mostly the prey of fish and aquatic invertebrates. The leech is the most common invertebrate predator of the eggs. Some salamanders feed on each others' eggs.