Natural Environment: This is an encrusting photosynthetic soft coral that generally inhabits protected, fairly shallow nutrient rich back reef areas where gentle currents exist. Its cylindrical-shaped polyps, tall, about 5 inches (12 cm), are part of an encrusting base that usually encompasses dead coral rubble and hardpan areas. Polyps have 8 delicate pinnate tentacles, which have been seen to rhythmically open and close (pulse) in the wild. The most common color is a rich brown, however, however, other colors such as ashen grey, and/or very light tan specimens have also been seen.
General Husbandry: This species prefers a well-lighted area and where water quality is somewhat nutrient rich and gentle flows exist. As to direct feeding, it appears not to benefit from such endeavors. As with Xenia, the use of activated carbon should be limited as it may affect their growth simply because this product lowers the aquarium’s nutrient content, even though I’ve personally not found that to be true. Keep in mind this species can, as can Xenia, spread quite fast under the right circumstances. Therefore it’s wise to provided enough surrounding space for growth, as it can 'simply’ overgrow its neighbors. Also, Anthelia does not seem to contain any toxic chemicals, therefore, its extremely compatible with other type corals it touches.
Often confused with Xenia, which is similar in appearance, however, Xenia polyps extend from its stalk or branches, whereas the larger Anthelia polyps arise directly from its encrusting base. As to pulsing, Xenia is usually purchased because its polyp’s tentacles have the capacity to pulse at regular intervals, but even though Anthelia polyp tentacles are also said to pulse in the wild, it occurs far less than do Xenia polyps. It is thought the pulsing tends to move dissolved organic laden water past the tentacles and/or is a form of respiration where dangerously high levels of dissolved oxygen are dissipated. One thing for sure, the reason for pulsing is still conjecture.
Even though this species is a poor shipper, healthy specimens, once established are quite hardy and disease resistant. Water quality requirements are: Calcium 380 - 430 ppm, Alkalinity 3.5 meq/l, pH 8.1 - 8.2, Specific Gravity 1.023 - 1.026, and a temperature range of 74 to 83°F (23 - 28°C).