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Can sponges move around slideshow10/4/2023 ![]() ![]() ![]() Phylum porifera are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Exclusively marine, calcareous sponges predominantly inhabit shallow tropical waters. The phylum Porifera has four classes, namely the Calcarea, Demospongiae, Hexactinellida and Homoscleromorpha. They are diploblastic animals with two layers, the outer dermal layer and the inner gastral layer.Body shape can be cylindrical, vase-like, rounded or sac-like. ![]()
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