There are now reckoned to be six species of fire-bellied toad, grouped in the genus Bombina, of which the best-known is the Oriental fire-bellied toad (B. orientalis). It grows to about 6cm (2.5in) long, and ranges from Korea northwards to parts of Russia and north-east China.
Oriental fire-bellied toads are widely bred, and occur in two different colour variants. The traditional form, sometimes described as the Korean, has mainly lime green upperparts, broken with variable black patterning. This creates an attractive contrast with the individual fiery orange markings on the underparts.