Medusa stage is not found in the coelenterate of class

Options

A. Hydrozoa
B. Scyphozoa
C. Sporozoa
D. Anthozoa

Answer

To solve the question "Medusa stage is not found in the coelenterate of class," we need to analyze the different classes of coelenterates (Cnidarians) and determine which one does not exhibit the Medusa stage.

### Step-by-Step Solution:

1. **Understand the Medusa Stage**: The Medusa stage is one of the two main body forms of coelenterates, the other being the polyp stage. In the Medusa stage, the organism is typically free-swimming and has a bell-shaped body.

2. **Identify the Classes of Coelenterates**: The main classes of coelenterates include:
- Hydrozoa
- Scyphozoa
- Anthozoa
- Cubozoa

3. **Analyze Each Class**:
- **Hydrozoa**: This class includes species that exhibit both polyp and Medusa stages. Therefore, Medusa is present here.
- **Scyphozoa**: This class primarily consists of jellyfish, which are in the Medusa form for most of their life cycle. Hence, Medusa is present here.
- **Cubozoa**: This class also includes box jellyfish, which have a prominent Medusa stage. Thus, Medusa is present here.
- **Anthozoa**: This class includes corals and sea anemones. Members of this class do not have a Medusa stage; they exist only in the polyp form.

4. **Conclusion**: Based on the analysis, the class that does not have a Medusa stage is **Anthozoa**.

### Final Answer:
The correct answer is **Anthozoa**.

---