Like other anemones, the Venus flytrap anemone resembles a flower, but is actually an animal. It consists of a stem-like body topped with a wide mouth-like disk surrounded by tentacles. These anemones vary in color—they often have white or pastel bodies with brightly colored disks and tentacles in shades of pink and orange. They're unusual among anemones because they stand upright and yet are not fully anchored to the substrate. This allows the animals to be swept away rather than buried when the sediment shifts with underwater currents. If threatened, the Venus flytrap anemone can close its disk with the tentacles inside and retract itself so only the stem remains