Porifera
Sponges do not have circulatory system. They rely on keeping up a constant water flow through their bodies to obtain food and oxygen and to remove wastes. The body of a sponge consists of jelly-like material, mesohyl, made mainly of collagen and reinforced by a dense network of fibres also made of collagen sandwiched between two thin layers of cells. Many also have a skeleton made up of spicules of calcium carbonate or silica. Its a water bases circulatory system. Sponges have flangulated cells over the surface of their bodie, these are the cells that have tails that wiggle.
Gaint Barrel Sponge- This species of sponge is one of the largest species found in the Caribbean. It grows at a depth of ten meters or more. It grows up to the size of about 1.8 meters. The Giant Barrel Sponge is a brown-grey and reddish color. There is no real circulatory system.
Yellow Tube Sponges- They grow in shallow water and are abundant in the Caribbean. They have flagellated cells over the surface of their bodies. The effort of all these cells create a water current in the openings in the sponges body which helps to send many nutrients and minerals throughout the body.
Fire Sponge- It has a massively incrusting to lobate, with a smooth, tuberculate or villous surface. The sponges oscules are 0.5 cm or more in diameter on top of volcano-like projections. It grows up to up to 20 cm in horizontal expansion, up to 15 cm thick. It is consistency soft, compressible, easily to tear. It is mostly found in sheltered bays and lagoons, on mangroves and among eelgrasses or algae. Its color is a bright, warm red and occasionally rosy or even orange.