Aquatic animals are animals that live in water. They have adapted to their watery environment in various ways, which help them survive and thrive. One of the characteristics of aquatic animals is that they have certain physical features that are specifically designed for living in water. Let's take a closer look at the options given in the question.

Dry skin with hair:
This is not a characteristic feature of aquatic animals. In fact, it is the opposite of what they have. Aquatic animals have moist skin, which helps them absorb oxygen from the water. They do not have hair either, as it would create resistance in the water.

Gill chambers:
Most aquatic animals have gill chambers, which are specialized organs that allow them to breathe underwater. The gills extract oxygen from the water and release carbon dioxide.

Moist skin:
Aquatic animals have moist skin, which helps them absorb oxygen from the water. This is because water contains dissolved oxygen, which is necessary for respiration.

Webbed toes:
Many aquatic animals have webbed toes, which help them swim efficiently through the water. The webbing increases the surface area of their feet, which allows them to push against the water and move forward.

In conclusion, dry skin with hair is not a characteristic feature of aquatic animals. Instead, they have moist skin, gill chambers, and webbed toes, all of which help them survive and thrive in their watery environment.

Dry skin is not a characteristic of aquatic animals because they live in water and their skin is wet and moist and also some of them have scales instead of hair therefore the answer C.