What type of coral does not rely on photosynthetic algae and must be fed directly?

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Non-photosynthetic corals like sun corals and carnation corals obtain all their nutrition from capturing food particles in the water (Review) column. They are considered among the most challenging organisms to keep in a reef aquarium (Deals) because they require frequent target feeding. Despite the difficulty, experienced hobbyists prize them for their vibrant colors and unique feeding behaviors.

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