Long Tentacle Plate Coral polyps are solitary, free-living (except for juveniles) and flat with a central mouth. Their polyps are amongst the largest of all corals. Tentacles are generally extended day and night and are quite long, similar to those of anemones. This type of coral prefer low to moderate water flow, with optimum being enough to lightly wave its tentacles.
This type of coral packs quite a powerful sting similar to an anemone, and this is aggravated by the fact that it has a habit of moving itself around the aquarium. The best way to force the plate coral to stay in one place is to use small rocks to prevent its wandering, as it can and will sting other creatures within the tank.
Long Tentacle Plate Coral should be place at the bottom of the tank in the sandy substrate. Penning with rocks is a good idea to prevent it from inflating its tissues and moving freely about the tank and stinging its fellow reef mates. Maintaining the correct calcium levels in the marine tank is very important for skeletal development. (thesea.org)