Biome of uncertain gravity

He walked through the bulkhead, the whirring of unseen motors in his ear as it closed again. He still wore the protective suit, but the vista up and around him suggested little use for it. The ossified, once organic walls, stretched out into the distance and up towards the light. The light was oddly filtered by the leaves, pollen and unsettled dirt. Plants grew uncertain towards the light, zigzagging irregularly. Utterly alien, yet recognisably albian life danced between the flora. He looked at the doors high in the walls and ceiling, and unclasped his gravity boots. Floating up, he thought only one thing:”a thousand year old experiment, and I get to witness the results!”

Creatures 1 had only a very simple simulated gravity. Things were on the ground, or held by something or someone. C2 had expanded upon this, allowing falling, and with mods, swimming and flying. Creatures 3 could have been the one to let go of gravity entirely, since it played in space, but they never did. But what if..?

The idea is that for whatever reason, intentionally or not, certain rooms would lack gravity. Toys and food would float through the room and an entire ecosystem would develop in this least natural environment. In addition, creatures themself would need space faring adaptations.

Let's take the common norn. They would probably be able to navigate the weightless chamber with some difficulty, but the goal is always perfect adaptation. A space version of the mernorn. 

Certain difficulties exist when living in space, and specifically the lack of gravity is an interesting one. Holding on is important, regardless of surface. Glass, metal, organic materials and even dirt. Staying in place if the gravity were to shift, or to prevent drifting away when the creature is asleep. 

The same goes for the eggs. Either eggs need to be very sturdy and the hatchlings very self-reliant, or the eggs need to stay put somehow.

Depth Perception would be essential. So would reach be, you never know when a tasty morsel floats by, or which appendage is near some holdfast first. The ability to shift their weight around to change direction or rotation.

Sticky feet and paws would address the first problem. Gecko pads, suction cups or slime would all allow for this, the first suggested by GimmeCat. Sticky eggs or a pouch would keep the eggs in place. Many arboreal adaptations, like front facing eyes and prehensile tail would be necessary. 

Space has more dangers than just gravity and issues like radiation and extreme fluctuations in temperature could also effect this creatures look.

He held on to the door above him. Above was a very relative term though, and with some shifting and turning it suddenly was next to him. It was odd how much he had travelled through the stars yet had experienced low gravity so little. A floating snail pooted past, the tiny pops of gas propelling it. He marvelled at the practical use of weightlessness, making the large chamber a multileveled hub without using slopes or elevators.

Replacing elevators is one use for lack of gravity, but there are more uses when it comes to gameplay. The entire room could be a hurdle for unlocking all the rooms in the ship or activating all tools. Practically, all creatures entering the room would be given weightlessness and be assigned to a flying agent of sorts.

Like the pooting snail several animals would have strange adaptations for dealing with the weightlessness. The environment could be called a combination between the ocean and an arboreal environment. Branches for holding grow from every surface, yet there is no downward pull so spores, plants and little life could stay up in the air. Airborne plants and mushrooms slowly bounce and float in the soft flows of air. Fish-like grazers could eat both leaves from the branches and filter feed. Arboreal opossums with degenerated limbs would appear like furry, 5 limbed octopuses.