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What type of symmetry do sponges have? A: Some sponges have radial symmetry, but many species are irregular in shape and have no symmetry at all. Two simpler groups of sponges, known as asconoid an... Full Answer >
Epidermius- outercovering then cellular inside lined with choanocytes then mesohy jelly layer in between the too noncelluar. Sponges consist of a body wall of 3 layers (2 cell layers surrounding a jellylike mesohyl layer). The outer body wall is composed of epidermal cells which serve as covering for the sponge.