This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Kun (Chinese)
The first account contrasts the giant Peng bird with a small tiao ("cicada") and jiu ("pigeon; turtledove") and the third with a yan ("quail"). The Peng fish-bird transformation is not only the beginning myth in Zhuangzi, but Robert Allinson claims, "the central myth". Kun-pengs are massive beasts that look like hybrids of fish and birds.
They tend to have fish-like bodies, but their pectoral fins have been replaced by bird-like wings, their mouths are bird-like beaks, and their caudal fins basically look like fish fins, but placed horizontally, like whale flukes, and look like bird tail feathers. Also, their dorsal and pelvic fins look similar to their tail fins.