A calcareous sponge is any of a variety of sponge of the class Calcarea, with skeletons composed of spicules of calcium carbonate.
calcareous alge adaptations
calcareous algae
Grantia belong to the class Calcarea, a class of marine sponges characterized by their calcareous (calcium carbonate) spicules. They are filter feeders that are commonly found in shallow coastal waters.
Calcareous ooze is an examploe of biogenous sediment.
an example of calcareous sponge is SPONGE BOB!
The three classes of sponge skeletons are siliceous or glass sponges (Class Hexactinellida), calcareous sponges (Class Calcarea), and sponges with a fibrous protein skeleton (Class Demospongiae). Each class has unique structural characteristics that support the sponge's body.
As far as i know, calcareous means "containing or pertaining to calcium".
Any of various echinoderms of the class Echinoidea, having a soft body enclosed in a round, symmetrical, calcareous shell covered with long spines
biogenous
Calcareous ooze
Calcareous oozes form from the skeletal remains of very small plankton-like sea creatures settling on the bottom of the ocean upon their death.