Why is Euplectella called venus-flower basket?

Explanation

**Step-by-Step Solution:**

1. **Classification of Euplectella**: Euplectella is classified under the Phylum Porifera and belongs to the class Hexactinellida. This classification is important as it helps us understand its biological characteristics.

2. **Composition of Skeleton**: The skeleton of Euplectella is made up of silica, which is a key feature of its structure. This composition contributes to its unique properties and appearance.

3. **Cultural Significance**: When the skeletons of Euplectella dry out or die, they are often used as marriage gifts in Japan. This cultural practice highlights the importance of this organism beyond its biological aspects.

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