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Also known as Marine Sponges, Siliceous Sponges and Demosponge. Found on coral and rocky reefs in every habitat, spreading across the substrate in finger like projections. Varies in colour. They.. more
Also known as Siliceous Sponges, Marine Sponge and Blue Sponge. Found on coral and rocky reefs on ledges and walls, spreading with short projections. They feed on plankton. Length -.. more