Daphnia is
(a) Water Flea
(b) Tadpole Shirmp
(c) Fairy Shrimp
(d) Clam Shirmp

Options

A. Water Flea
B. Tadpole Shirmp
C. Fairy Shrimp
D. Clam Shirmp.

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about Daphnia. We need to determine what Daphnia is commonly known as.

2. **Research Daphnia**: Daphnia is scientifically known as Daphnia pulex. It is a small aquatic crustacean.

3. **Common Name**: Daphnia is commonly referred to as "water flea." This name is derived from its appearance and swimming movements, which resemble those of a flea.

4. **Review Other Options**:
- (b) Tadpole shrimp: This refers to organisms in the class Notostraca.
- (c) Fairy shrimp: This refers to organisms in the class Anostraca.
- (d) Clam shrimp: This refers to organisms in the class Branchiopoda, specifically the order Laevicardia.

5. **Eliminate Incorrect Options**: Since Daphnia is specifically known as water flea, we can eliminate options (b), (c), and (d) based on their scientific classifications.

6. **Conclusion**: Therefore, the correct answer is (a) Water Flea.

**Final Answer**: Daphnia is (a) Water Flea.

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