Cuvierian organs are found in

Options

A. Asterias
B. Holothuria
C. Echinus
D. Antedon

Answer

### Step-by-Step Solution:

1. **Understanding Cuvierian Organs**:
- Cuvierian organs, also known as Cuvierian tubules, are specialized structures that serve a defensive function in certain marine animals.

2. **Identifying the Organism**:
- The question asks where Cuvierian organs are found. The options provided are:
- A) Asterias (Starfish)
- B) Holothuria (Sea Cucumber)
- C) Echinus (Sea Urchin)
- D) Antidome (Crinoids)

3. **Analyzing the Options**:
- **Asterias**: This is a genus of starfish, which do not possess Cuvierian organs.
- **Holothuria**: This is the genus of sea cucumbers, which are known to have Cuvierian organs.
- **Echinus**: This refers to sea urchins, which also do not have Cuvierian organs.
- **Antidome**: This is a genus of crinoids, which do not possess Cuvierian organs.

4. **Conclusion**:
- Based on the analysis, Cuvierian organs are specifically found in the genus **Holothuria** (sea cucumbers). Therefore, the correct answer is **B) Holothuria**.