Outlines are a feature in mope.io. Animals you can eat have a light green outline, and animals that can eat you have a red outline, and often with a green area to bite the animals tail. You and other animals that are too far away from your current tier to either eat or be eaten by you have a dark green, blue, or gray outline, depending on if you are on land, water, or the arctic.
- On March 14, dark green outlines in Ocean were changed to blue and dark green outlines in the Arctic were changed to gray. Land animals have a Dark Green Outline.
- Outlines used to be in the older logo of Mope.io as if Pike's old logo used to have a red outline for the dragon and a light green outline for the mouse, but that was fixed in the final logo, since Dragons can't eat mice!
- Food also have outlines to tell if it's edible or not, but food never has a red outline. (Food can't eat animals, that would just be weird!)
- However, ducks can eat you... but they are AI animals, not food.