The jellyfish belongs to the phylum Porifera. The opposite of anterior is posterior. The father of modern Taxonomy is Carolus Linnaeus. The scientific name of an organism contains the family and species names.
Spicules are bone-like structures found in the Hydra.
The sponge captures and digests its food by using its amebocytes. An order is larger than a class. The large opening at the top of the sponge is called the osculum. The two body forms of Cnidarians are polyp and sessile. The spicules are made of one of 2 substances.