(B) $Euplectella$,commonly known as the Venus flower basket,is a marine sponge belonging to the phylum $Porifera$.It is classified under the class $He

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(B) $Euplectella$,commonly known as the Venus flower basket,is a marine sponge belonging to the phylum $Porifera$.It is classified under the class $Hexactinellida$ (also known as glass sponges) because its skeleton is composed of siliceous spicules that are six-rayed (hexactine).