Which of the following causes parasitic castration of crab

Options

A. Spongilla
B. Adansia
C. Sacculina
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The organism responsible for parasitic castration of crabs is identified as "Succulina". This genus belongs to the group of parasites known as barnacles.

2. **Understand the Process**: Parasitic castration is a strategy employed by the parasite. It involves the blocking of the reproductive capabilities of the host, in this case, the crab.

3. **Mechanism of Action**: The parasite can either completely or partially inhibit the reproductive functions of the crab. If the infection is severe, it may completely block reproduction, while a milder infection may only partially affect it.

4. **Conclusion**: Therefore, the answer to the question is that the organism "Succulina" causes parasitic castration of crabs.

---