The correct option is
C LeucosoleniaA. Euplectella, also known as Venus flower basket, is a sponge belonging to class Hexactinellida.
B. Hyalonema is a glass rope sponge belonging to Hexactinellida found in sea only.
C. Leucosolenia is a marine, sessile, radially symmetrical, colonial sponge, attached to the substratum by adhesive discs.
D. Cliona is the boring sponge destroying several molluscan shells.
So, the correct answer is 'Leucosolenia'.