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Giant Barrel Sponge (Xestospongia muta): very large, deep-water sponges, with a rough exterior surface. |
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Netted Barrel Sponge (Verongula gigantea): large sponges, with a raised network visible on exterior surface. |
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Brown Bowl Sponge (Cribrochalina vasculum): dark, stiff, bowl-shaped sponge. |