Endless Vogue of the Flying Worlds
The Biospheres are structured with an upper layer of caripis with natcherly functioning hatches which allow ships to come and go, and medal terrain lare were all creatures live upon, and an inner layer where the guts of the Biosphere are retained. There are pillars that support the structure of the Biosphere and the pillars have pores that allow the Crew-bugs to move through to the middle and inner layers.
The inside of the Biospheres is dim. It has only bioluminescent plants to light the interior.