Ctenophores are commonly called

Options

A. jelly fishes
B. sea biscuits
C. sea walnuts
D. sea lions

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about Ctenophores, which are a group of marine invertebrates.

2. **Understand Ctenophores**: Ctenophores are known for their unique features, such as having rows of ciliated combs that help them move through water.

3. **Common Names**: Ctenophores are commonly referred to by several names. The most recognized common name is "comb jellies" due to their ciliated structures.

4. **Review Options**: The options provided are:
- A) Jellyfishes
- B) Sea biscuits
- C) Sea walnuts
- D) Sea lions

5. **Analyze Each Option**:
- **Jellyfishes**: These belong to a different phylum (Cnidaria) and are not the same as Ctenophores.
- **Sea biscuits**: This term does not apply to Ctenophores.
- **Sea walnuts**: This is one of the common names for Ctenophores, specifically referring to their shape and texture.
- **Sea lions**: This term refers to a group of marine mammals and is unrelated to Ctenophores.

6. **Select the Correct Answer**: Based on the analysis, the correct answer is C) Sea walnuts, as it is a recognized common name for Ctenophores.

**Final Answer**: Ctenophores are commonly called **sea walnuts**.

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