![]() Life activities depend on current of water.Detritus particles, planktonic organisms, and bacteria.Phagocytize – absorption through the cell wall creating food vacuoles.Flagellated collar cells to maintain a current through the canalsĬhoanocytes also trap and phagocytize food particles that are carried in the water.Oscula – a few large pores for water outlet.Ostia – many tiny pores for incoming water.Elaborate skeletal framework and often noxious odor provide protection against predators.(one species benefits and the other is not harmed).Larger sponges tend to harbor a large variety of invertebrates commensally.The calmer the water, the taller and straighter the sponge grows.Adults attach to objects (rocks, corral, shells, etc.).More than 5000 species of sponges are marine.Some stand erect, some are branched or lobed, and others are low in form (encrusted).Some are radially symmetrical, but many are quite irregular in shape.(red, yellow, orange, green, and purple).calcium carbonate or silica and collagen. ![]() stiffened by a skeleton of minute spicules.Bodies are little more than masses of cells embedded in a gelatinous matrix.depend on water currents to bring them food and oxygen and carry away their body wastes.many tiny pores and canals adequate for their inactive life habit. ![]()
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