Animals that inhabit the Anvil Cloudlands
The Aerocetus are massive flying whales swim through the sky, feeding on Krill Fog, using their baleen to filter out edible matter. They are hunted by Cloud Drakes. Aerocetus bear a number of parasites and hitchhikers. A few of their barnacles are actually valuable alchemical ingredients for those who are fast or friendly enough to approach such a large creature safely.
A ship captain by the name of Captain Baha seeks after a particular Aerocetus for revenge, as it ate his hand