Water Animals:
Water animals are a broad category of organisms that live in aquatic environments, such as oceans, rivers, lakes, and ponds. They have adapted to life in water and possess various characteristics that enable them to survive in these habitats. Some examples of water animals include fish, whales, dolphins, seals, and turtles.

Aquatic Animals:
Aquatic animals are organisms that exclusively live in water. They can be found in both freshwater and saltwater environments. These animals have adapted to their surroundings and have specific features that allow them to live and thrive in water.

Amphibians:
Amphibians are a group of animals that are capable of living both in water and on land. They typically start their lives in water as larvae and undergo metamorphosis to develop into adults that can live on land. Amphibians have moist skin that helps them breathe, as they can absorb oxygen through their skin. Examples of amphibians include frogs, toads, salamanders, and newts.

Differences:
While water animals and aquatic animals both live in water, there is a subtle difference between the two terms. Water animals refer to a broader category that includes all animals that live in water, whether they are aquatic or not. On the other hand, aquatic animals are specifically adapted to live in water and cannot survive outside of it. Amphibians, although they spend a significant part of their lives in water, can also live on land and are not exclusively aquatic.

Similarities:
Both water animals and aquatic animals have adaptations that allow them to live in water. They possess streamlined bodies, fins, or flippers that help them move efficiently through the water. Their respiratory systems have also evolved to extract oxygen from the water. Additionally, these animals have developed specialized senses, such as lateral lines or echo-location, to navigate and find food in their aquatic environments.

In conclusion, water animals and aquatic animals are terms used to describe organisms that live in water. While water animals encompass a broader range of organisms, including both aquatic and non-aquatic species, aquatic animals specifically refer to organisms that are adapted to live exclusively in water. Amphibians, although they spend a significant part of their lives in water, can also live on land.

(2) Aquatic animal