Molluscan which form hole in wood of ships, is?

Options

A. Doris
B. Chiton
C. Teredo
D. Limax

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for a specific mollusk that creates holes in the wood of ships.

2. **Recall Relevant Information**: It is known that certain mollusks, particularly those in the bivalve class, can bore into wood.

3. **Identify the Specific Mollusk**: The mollusk that is known for boring into wood is called "Teredo," commonly referred to as the "shipworm."

4. **Understand the Characteristics**: Teredo is a marine organism that resembles a worm and has an elongated body with a small shell. The shell consists of two valves that are modified for boring into wood.

5. **Clarify the Name**: The full scientific name of the shipworm is "Teredo navalis," and it is often referred to as the "termite of the ocean" due to its wood-boring behavior.

6. **Eliminate Other Options**: Other mollusks mentioned, such as Doris (sea slug), Chiton, and Limex (Great Gley Slug), do not bore into wood and therefore cannot be the answer.

7. **Conclude the Answer**: Based on the information, the correct answer to the question is "Teredo."

**Final Answer**: The mollusk that forms holes in the wood of ships is "Teredo" (commonly known as shipworm).

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