Photos from a marine wonderer
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Yellow pencil coral (Madracis auretenra)

mauretenra.jpg Common octopus (<i>Octopus vulgaris</i>)ThumbnailsThree finger leaf alga (<i>Halimeda incrassata</i>)

Notice that most of the colony has polyps extended giving it a "fuzzy" look. You can clearly see the branches where the polyps are retracted where the coral looks smooth.