Lantern Mice look like glowing hamsters with big eyes, two dots on each side of their body, and elastic tails they use to hang from the ceilings and scaffolding. They come primarily in red, blue, and yellow tinted colors. Green- and purple- tinted Lantern Mice can also appear, but are significantly rarer.
While Lantern Mice are referred to as mice, they are nearly the size of a Slugcat.
Lantern Mice are one of the 10 backer-created creatures, specifically created by co-composer Lydia Esrig.
In 1.5, Lantern Mice are only capable of swimming in shallow water. Otherwise, they float around in the water until they get close enough to the shore to climb out.
In 1.9, they are now capable of swimming on the water's surface.
Lantern Mice are unafraid of Scavengers and ignore them. Scavengers likewise do not seem to acknowledge Lantern Mice.
Lantern Mice have a 1/17 chance of facing the opposite way and a 1/8 chance of hanging their hands down when sleeping.
There is a 1/100 chance that any individual Lantern Mouse has a completely random hue.
Lantern Mice do not eat Batflies despite having a "want to eat" relationship with them. Batflies are also not scared of Lantern Mice.
In incredibly rare circumstances, a Lantern Mouse may decide the best place to dangle from is a ceiling underwater. Under even rarer circumstances, such a mouse may drown to death due to its tail length. Lantern Mice do not detach if drowning.
Despite their unique interaction with the ceiling, they are unable to climb any walls, background walls or ceilings like other creatures, the only way they can reach the ceiling is through crawlspaces or poles, resulting in them often packing together hanging from the same spot.
The level design in Shaded Citadel allows this behaviour to properly work, featuring multiple ceiling passages and crawlspaces, however taking them out of that region makes them often find less convenient hanging spots.