The Placid Segmaris is the sole food source of the Sky Shepherd. They are essentially floating livestock that are nurtured, herded, and protected until such time as the shepherds need to consume them. The tri-part symbiosis between the Sky Shepherds, the Segmaris, and their large floating counterpart (partially visible as the reddish-brown creature on the right side of the image) is rather complicated, and will be the subject of further works. Helpless on their own, the Segmaris relies on its symbionts for neary everything- protection, reproduction, much of their locomotion, and Hydrogen. The only thing it is capable of accomplishing by itself is the acquisition of food- which is does by filtering particles and small microfauna from the dense atmosphere where it lives. Adults are around 50 feet long at maximum, young start out around a foot long.