Firebelly Newt
The Fire Belly Newts (Cynops), or Fire Newts, are a genus of newts native to Japan and China. All of the species show bright yellow or red bellies, however this feature is not unique to this genus. Their skin contains a toxin that can be harmful if ingested.
Read more about Firebelly Newt: Species, Fire Belly Newts As Pets, Taxonomic Controversy, Aquarium Proportions