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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 >
Typical size: 1 thickID: Varies, but typically yellow with numerous, low volcano-like nipples.Comments: The fairly common sponge often collects debris and has a somewhat dirty appearance. Blakely Rock has several healthy colonies of this sponges. AS teh name implies the nipples on this sponge can retract.