how sponge-like can a sponge be?

Using Fluorescent Dye To Show How Sponges Filter Feed (video at link)

at 1:40 :

"These ghostly exhalations are proof that the sponge is actively pumping. With no mouth it sucks water directly through its spongelike body walls which are shot through with millions of narrow canals and tiny chambers"

Were some viewers were expecting it to giraffe-like? I would have assumed that a sponge would be about as spongelike as anything is possible to be.