Mackerel is a

Options

A. fresh water fish
B. marine fish
C. brackish water fish
D. aquarium fish

Answer

### Step-by-Step Solution:

1. **Identify the Classification of Mackerel**:
- Mackerel is a type of fish that belongs to the class Pisces, which is part of the phylum Chordata.

2. **Determine the Type of Fish**:
- Within the class Pisces, fish are categorized into two main types: bony fishes (Osteichthyes) and cartilaginous fishes (Chondrichthyes). Mackerel is classified as a bony fish.

3. **Identify the Habitat**:
- Mackerel is primarily found in marine environments, which are characterized by high salt content. This type of water is referred to as hyper saline water.

4. **Feeding Habits**:
- Mackerel is a carnivorous fish, meaning it primarily feeds on smaller fish.

5. **Conclusion**:
- Based on the classification and habitat, mackerel is identified as a marine fish.

### Final Answer:
Mackerel is a marine fish.

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