The marine organisms showing spinning movements and responsible for killing fishes by producing toxins belong to the following kingdom of Whittaker

Options

A. Fungi
B. Animalia
C. Monera
D. Protista.

Answer

To solve the question regarding the marine organisms that exhibit spinning movements and are responsible for killing fish by producing toxins, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about marine organisms that show spinning movements and produce toxins that kill fish. We need to identify which kingdom of Whittaker these organisms belong to.

2. **Identify Key Characteristics**: The key characteristics mentioned in the question are:
- Marine organisms
- Spinning movements
- Production of toxins that kill fish

3. **Recall the Five Kingdom Classification**: The five kingdoms proposed by Whittaker are:
- Monera
- Protista
- Fungi
- Plantae
- Animalia

4. **Analyze Each Option**:
- **Fungi**: Fungi do not show spinning movements and are not typically marine organisms that produce toxins.
- **Animalia**: While some animals may be marine, they do not exhibit spinning movements in the context of producing toxins.
- **Monera**: This kingdom includes bacteria, which do not exhibit spinning movements.
- **Protista**: This kingdom includes dinoflagellates, which are known to be marine organisms that exhibit spinning movements and can produce toxins that are harmful to fish.

5. **Conclusion**: Based on the analysis, the organisms in question are dinoflagellates, which belong to the kingdom Protista. Therefore, the correct answer is **kingdom Protista**.

### Final Answer:
The marine organisms showing spinning movements and responsible for killing fishes by producing toxins belong to the **kingdom Protista**.

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