- This article is about the animal. For the edible one, see Mouse (food).
- Spawns with 5 XP (Formerly 10) at the ready.
- Has a maximum XP of 50, at which point it evolves automatically into the Rabbit, Arctic Hare, or Trout. (Depending on what biome it is in.)
- Can eat Berries and Plankton. If you die you will re-spawn as a Mouse or a Shrimp.
The Mouse is one of the simplest (from the lack of abilities) and smallest animals in the game - only freshly upgraded Rabbits, Trout, and Arctic Hares are slightly smaller. It is one of the only animals without a bite-able tail, the only others being the Shrimp, Chipmunk, Lemming, Rabbit, Trout, Arctic Hare, and Crab. Its base is gray and features a gray triangular snout with a gray-pink circular nose, large black eyes, darker gray ears, and a pink tail. The eyes are bigger than most animals, implying a small defenseless animal, and possibly for others to take pity on it. It didn't really work.
The best way to upgrade is to find mushrooms and press "s" to shoot water into them. Once you've shot water into them, they will get bigger and bigger until they've turned into lots of berries you can eat. Keep doing this until you upgrade. (Doing this with a rabbit has also been proven effective) Make sure you shoot water into the right kind of mushrooms though, shooting into red mushrooms will take more of your water and give less eatable food. (A few berries and more mushrooms)
Always be on the watch for Rabbits, Pigs, Moles, and Deer. Be wary when getting close to a Hiding Hole, as smart predators might be lying in wait, though this goes for "all" animals and not just mice.
Healing Stones are a great way to level up as they can easily fill up experience bars of lower-ranked animals from mouse to deer and the ocean variant. While Healing Stones can restore your health, you are still vulnerable to attacks and death, and so, be wary of predators while leveling up via Healing Stones.
When running from predators, use your small size to your advantage and squeeze through narrow gaps. This can be especially useful against Pigs and Deer, but you may have to take a few hits before squeezing through certain holes. Rabbits can squeeze through many of the spaces that you can, and Moles can burrow underneath. Be careful on Mud as both Pigs, and burrowing Moles are faster than you. There are also Deer that may visit a patch of Mud to dig for food, and may or may not eat you.
Starting with the January 26 Update, you can go over Water spots, along with all the other animals. Use that to your advantage.
- Before a recent update, the text that appeared when you first spawned originally read: "A little mouse... Drink Water, eat berries to grow!"
- (Old) Biting a Mouse who actually upgraded from Dragon/Kraken (see above) will give 10K XP.
- The mouse's appearance was changed 3 times.
- The mouse has the smallest vision.
- It's one of only 6 animals that don't have a tail (Mouse, Shrimp, Trout, Rabbit, Arctic Hare, and Crab).
- It has an old new appearance but it was changed.
- the AI Mouse is introduced at November 15th. This is the third AI in game.
- If your PC have slow Internet or he just slowly, the mouse will appear. At the top will be a message:"connecting", and the mouse will spin around.