Citrus is a genus of flowering trees and shrubs in the rue family, Rutaceae.
Plants in the genus produce citrus fruits, including important crops like oranges, lemons, grapefruit, pomelo and limes.
Many citrus fruits, such as oranges, tangerines, grapefruits, and clementines, are generally eaten fresh.
They are typically peeled and can be easily split into segments.
Grapefruit is more commonly halved and eaten out of the skin with a spoon.
There are special spoons (grapefruit spoons) with serrated tips designed for this purpose. Orange and grapefruit juices are also very popular breakfast beverages. (source)
Can guinea pigs eat citrus fruits?
No they can’t at all. They are not good for them.
Citrus fruits are far too acidic for guinea pigs and generally should be avoided as a food for them.
For more foods that guinea pigs can and can’t eat check out our guinea pig food list