Calcareous Sponge
Calcinea
Calcaronea
The calcareous sponges of class Calcarea are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made out of calcium carbonate in the form of calcite or aragonite. While the spicules in most species have three points, in some species they have either two or four points.
Read more about Calcareous Sponge: Biology, Classification
Famous quotes containing the word sponge:
“Alas for the affairs of men! When they are fortunate you might compare them to a shadow; and if they are unfortunate, a wet sponge with one dash wipes the picture away.”
—Aeschylus (525–456 B.C.)