The consistency of a sponge depends on two factors—the number of spicules present, and the amount of spongin.
The amount of spongin present is also different in different species.
I can't stay an' be spongin' on you folks any longer, it wouldn't be proper.
In other species the spongin is intermixed with spicules of silica, or of carbonate of lime, in various shapes.
You better hustle ahead with your spongin' off; I'm just about through here!
In this genus the skeleton is more or less flexible, being composed of spongin.