Many fresh water. animals can not survive in a marine environment. Explain.

Explanation

### Step-by-Step Solution:

1. **Understanding the Environments**:
- Freshwater animals live in an environment where the salt concentration is low, while marine environments have a high salt concentration.

2. **Osmotic Pressure**:
- The difference in salt concentration creates an osmotic pressure difference. Freshwater animals are adapted to a hypotonic environment, meaning their body fluids have a higher concentration of salts compared to the surrounding water.

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