Biological Ecosystem of organisms constructed into large flying ships that have 'fin' sails and hulls made of leathery streatchy flesh. These ships are big enough to carry entire human and animal populations to simultaniously coexist. Most of these ships, however are piloted by ruthless armies, who take advantage of the people stuck on the barren wastelands below.
Elven made technologies, built into and around the animal to help control it's flight patterns along with Druid magic, to keep the beast compliant. It prefers moldy or rotten food to keep it going.
Naturally has Aerogel between layers of skin to keep it in the air. Aerogel is 9 times lighter than air.
Weapons & Armament
Whatever weapons humans carry onboard
Armor and defense
Minimal, although it does heal fairly fast for an animal of it's size
Communication Tools & Systems
Auditory beacon, much like a whale would to find food or other whales