What does the mode of breathing in lung fish indicate? Explain.

Explanation

### Step-by-Step Solution:

1. **Understanding Lung Fish**:
- Lung fish are a type of fish that possess both gills and lungs. This unique feature sets them apart from most other fish, which typically rely solely on gills for respiration.

2. **Breathing Mechanism**:
- While lung fish can breathe through gills like other fish, they also have primitive lungs that allow them to extract oxygen from air. This adaptation is particularly useful in environments where water levels may be low or oxygen levels in water are insufficient.

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