Nibiru creatures
In the alternate reality, the planet Nibiru was home to a number of creatures.

Riding animal 

This animal was a large friendly quadruped, capable of standing on both two or four legs. It could be used as a riding animal by humanoids. 
In 2258, a startled  stunned one of these creatures, much to 's dismay, as they could have ridden it to escape a mob of angry Nibirans. ()

Tree creature 

This small anemone-like creature, which had many small legs and retractable tentacles or feelers, could be found moving through Nibiran trees. ()

Nibiru fish 

The oceans on Nibiru contained fish, some of which could grow quite large, like this giant fish who passed the observation bridge window while the  parked on the ground of the ocean. ()

Alternate reality
Unnamed² species