This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Jiaolong (Chinese)
Jiaolong is a dragon in Chinese mythology, often defined as a "scaled dragon"; it is hornless according to certain scholars and said to be aquatic or river-dwelling. It may have referred to a species of crocodile. It is known to take many forms, called chiao. It is sometimes regonized as a man, and sometimes simply a fish. Either way, this dragon was a river dragon, spirtually akin to the crocodile. It is described as 'a snake with four legs'.
They say when a number of fish in a pond reachs 3600, the Jiaolong will come as their leader and enable them to follow him and fly away. This can be stopped, however, by placing a fish trap in the water. The female counterpart of this dragon is called the Jiao, and is hornless. Unlike the Jiaolong, which has horns.