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Sponges are one of the strangest species that belongs to the animal kingdom as they mainly look more like plant than animal. One of the animal's unique characteristic is that they lost the ability to move about. And even they are considered as a living animal, they do not react when they are touch.
Correspondingly, what animal kingdom do sponges belong to?
Animal
Additionally, do sponges have organs?
They have partially differentiated tissues, and not true tissues. Sponges don't have internal organs. They don't have muscles, a nervous system, or a circulatory system. Their walls are lined with many small pores called ostia that allow water flow into the sponge.
Summary. Sponges are the simplest multicellular organisms, classified by their primitive cellular-level of organization, their porous bodies, and their filter-feeding system. Sponges have specialized cells that can carry out distinct functions within the organism.