These Tubastrea Aurea are 100% tank raised and trained to feed during the day light photoperiod, unlike the natural instincts of this species.  They are fed only during the lighted photoperiod and tend to stay open during this period when conditioned in this manner.  Day trained so to speak.  The seed fragments are started as two to three polyps and when fed several times per week can add new polyps quite rapidly.This coral does well with low light and frequent feeding provided water quality is kept in mind.