Space is not only very, very beeg, but full of all sorts of slimy, fuzzy, rocky, and just plain weird things that may or may not want to eat you.

A few (but not all) things that are mentioned:

https://starwars.fandom.com/wiki/Gundark

https://en.wikipedia.org/wiki/Blindsight_(Watts_novel)

https://en.wikipedia.org/wiki/Tribble

https://en.wikipedia.org/wiki/Critters_(film)

https://www.krispykrafts.com/