LPS (Large Polyp Stony) corals are generally larger calcareous corals with large fleshy polyps. Almost all LPS corals are wild caught as they are the most difficult corals to propagate in captivity. They range in ease of keep from being some of the easiest to some of the most difficult of corals to keep.
Many LPS corals have strong stinging capability similar to an anemone and care must be used in their placement so that they cannot reach their neighbors. To complicate matters a little more, some LPS corals also have long tentacles called sweeper tentacles which are longer than the normal tentacles and are used to ‘clear’ other corals away from their immediate vicinity.