Porifera - The species of the Porifera phylum also know as the "Sponge phylum" mostly live in marine environments. There are three sections of Porifera one being Calcarea or "calcareous sponges", another being Hexactinellida, or "glass sponges," and the last one being Demospongiae, or demosponges. The Porifera Phylum is home to about 5,000 different species. All members of the Porifera Phylum have no nervous system at all in other words they have no nerve cells at all, and no brain. Oxygen intake, waste removal, and digestion in Porifera relies on water in take and output. Species classified under Porifera are not able to react to any of their surroundings besides very slow organisms that travel on the oceans floor.
Fire Sponge - No nervous system.
Globular Sponges - lacks a nervous system.
Stove Pipe Sponge - Like all Porifera the stove pipe sponge has no nervous system.
Fire Sponge - No nervous system.
Globular Sponges - lacks a nervous system.
Stove Pipe Sponge - Like all Porifera the stove pipe sponge has no nervous system.