Which one is not exclusively marine

Options

A. Seal
B. Walrus
C. Whale
D. Dolphin

Answer

To determine which of the given animals is not exclusively marine, we need to analyze the habitats of each option provided. The options are: seal, walrus, whale, and dolphin.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks us to identify which animal is not exclusively marine, meaning it can also live in freshwater environments.

2. **Analyze Each Option**:
- **Seal**: Seals are primarily found in marine environments. They inhabit coastal areas and are commonly found in cold waters, particularly in the Arctic and Antarctic regions. Thus, seals are considered exclusively marine animals.

- **Walrus**: Walruses are also marine animals. They are divided into two categories: Atlantic walrus and Pacific walrus. Both types inhabit coastal areas and northern seas, primarily in regions like northeastern Canada, Greenland, Russia, and Alaska. Therefore, walruses are exclusively marine as well.

- **Whale**: Whales are known to be distributed worldwide in marine waters. They do not inhabit freshwater environments and are considered exclusively marine animals.

- **Dolphin**: Dolphins are unique among the options because they can live in both marine and freshwater environments. While they are commonly found in saltwater, certain species of dolphins can inhabit rivers and estuaries, making them not exclusively marine.

3. **Conclusion**: Based on the analysis, the animal that is not exclusively marine is the **dolphin**. Dolphins can thrive in both saltwater and freshwater habitats.

### Final Answer:
The animal that is not exclusively marine is **dolphin**.

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