Question

Which of the following animals was given as a wedding gift in Japan, as symboilizing the idea, 'till death us do part'?

• A. Hyalonema
• B. Euplectella
• C. Sycon
• D. Euspongia

Answer 1

The correct option is B Euplectella

Sponges are classified on the basis of different types of spicules they are Calcarea where the spicules are made up of calcium carbonate, Hexactinellida where the spicules are made up of silica, Demospongia where the spicules are composed of siliceous spicules or spongin fibers or both.

Euplectella aspergillum is a hexactinellid sponge. They are elegant, glassy sponges, consisting of interwoven siliceous fibers and growing in the form of a cornucopia and also known as Venus's flower basket.
In Japan, they symbolize the idea "till death us do part" and given as a wedding gift because the sponge symbiotically houses two small shrimp, a male, and a female, who live out their lives inside the sponge. They breed, and when their offspring are tiny, the offspring escape to find a 'Venus' flower basket' of their own.

So, the correct answer is option B.