sedentary

Phylum: Echinodermata, its classification and characteristics

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exclusively marine. multicellular, system grade of body organization. triploblastic, coelomate and radially symmetrical. free living, free swimming or sedentary. star shaped, oval shaped, globular, or discoidal with distinct oral or aboral surface. literally means spiny skinned animals. body surface is marked by five distinct ambulacral grooves and alternating five interambulacral area. water vascular system, consists … Read more

Phylum : Coelenterata (Cnidaria), its classification and characteristics

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multicellular with tissue grade of body organization. aquatic, mostly marine, few are found in fresh water. sedentary or free swimming. mostly radially symmetrical whereas few are asymmetrical. diploblastic i.e. outer layer is called ectoderm and inner layer is called endoderm. There is a jelly like layer present in between these 2 layers called mesogloea.   … Read more

Phylum: Porifera (sponge), its classification and characteristics

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 Multicellular, eukaryotic with cellular grade of body organization. Aquatic, mostly marine few found in fresh water. Solitary or colonial, free living. Sedentary and sessile. May be asymmetrical (Spongilla) or radially symmetrical (Leucosolenia). Body greatly varies in shape. They may be vase-like, cylindrical, tubular or cushion like. Body is provided with large number of small inhalant … Read more