There are no sugars that are exclusively found in animals and not in plants. However, some sugars are more prevalent in animals than in plants.

Here's why and some examples:

* Plants are the primary producers of sugars: They synthesize sugars through photosynthesis.

* Animals obtain sugars from consuming plants or other animals: This means they are often consuming the same sugars as plants.

* Metabolic differences: Animals and plants have different metabolic processes, leading to slight variations in sugar use and storage.

Sugars more prevalent in animals:

* Lactose: This is the sugar found in milk and is primarily associated with mammals. While some plants contain lactose, it is in extremely small amounts.

* Glycogen: This is the primary storage form of glucose in animals, while plants primarily use starch.

Important Note: It's important to understand that while some sugars are more prevalent in animals, this doesn't mean they are completely absent in plants.

Let me know if you'd like to learn more about specific sugars or their metabolic functions!