Drifting high in the clouds, these peaceful and massive airborne creatures are both rare and extremely valuable. They are rare because they take a very long time to grow to maturity and have no natural defenses against predators other than by staying camouflaged in the clouds they are out of range of most other creatures. However the brutal fact that they are a favored food source of aerial creatures meant that they were almost entirely wiped out during the age of the Dragons, but their numbers replenished enough that in recent centuries they have once again started appearing in the skies to such an extent that they have been harnessed as aerial transports..
Mostly translucent with white and grey coloring to blend in with the clouds they frequent, they draw sustenance from the water vapor and particles therein, and have no mouths nor eyes, but are filled with a lighter than air gas like substance that gives them their considerable buoyancy. They are only barely intelligent, and will pulsate and attempt to move away from any predator, but are slow moving and usually just drift along with the prevailing winds, though instinct drives them to position themselves to stay close to cloud cover, for when there are no clouds they are particularly conspicuous.
Early attempts to domesticate them by the people of Pomedica were only partially successful until the prolific inventor, Mercurio Montinari, created both a harness to attach them to baskets and small specially built airships and to extract the gases from their bodies to fill canvas air balloons as a substitute.
These airships, either carried directly by the Medusozua Zeppelinus or by balloons utilizing their gases (Zepgases), are typically used for transporting trade goods across the Empire, exploration, entertainment, scouting and even moving troops, however they have one major weakness that has prevented any serious military application other than the transportation of troops through safe air-corridors – and that is because the gas they produce is highly flammable. Combine this with difficulty navigating in strong winds and their usage in warfare has always been very limited – but their ability to carry heavy loads above land over long distances has made them indispensable to trade and transportation.