A dinoflagellate which is also known as sea ghost.

Options

A. Euglena
B. Ceratium
C. Noctiluca
D. Gonyaulax

Answer

**Step-by-Step Text Solution:**

1. **Identify the Organism:** The question asks for a dinoflagellate known as the "sea ghost."

2. **Review the Options:** The options provided are:
- A) Euglena
- B) Ceratium
- C) Noctiluca
- D) Gonilox

3. **Analyze Each Option:**
- **Option A: Euglena** - This is a euglenoid, not a dinoflagellate. It is unicellular and exhibits euglenoid movement, but it does not exhibit bioluminescence. Therefore, it cannot be the answer.
- **Option B: Ceratium** - This is a dinoflagellate, but it has a characteristic armored cellulosic cell wall and is typically golden brown in color. It is not known as the sea ghost, so this option is incorrect.
- **Option C: Noctiluca** - This is a dinoflagellate known as the "sea ghost." It is colorless, exhibits holozoic nutrition, and is known for its bioluminescence, which aligns with the description in the question. Thus, this is the correct answer.
- **Option D: Gonilox** - This is a red dinoflagellate and is not associated with the name "sea ghost." Therefore, this option is also incorrect.

4. **Conclusion:** After analyzing all options, the correct answer to the question "A dinoflagellate which is also known as sea ghost" is **C) Noctiluca**.

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