In Romanian mythology a balaur is a creature similar to a dragon.
A balaur is quite large, has fins, feet, and multiple serpent heads (usually three, sometimes seven, or even twelve).
As a traditional character which is found in most Romanian fairy tales, it represents Evil and must be defeated by Făt-Frumos in order to release the Princess.
Balaur seems to derive from Proto-Indo-European language *bel-, 'strong', or *bhel-, 'to swell'. It is considered to be a pre-Roman word from the Romanian substratum words.