Here's what I could find in "A Pocket Guide to Marine Invertebrates" by Ronald L. Shimek:
Up to about 12 inches in diameter across the disk, 50g tank minimum, moderate lighting, and needs to be fed for best health. "Reasonably hardy, but reported to kill fishes. Handle with gloves and extreme care; stings are notoriously painful. Do best in moderately strong currents and need a relatively deep sand bed to allow for burrowing activities. Some burrow during the day and emerge to feed at night, while others have the reverse behavior patterns. No clownfishes naturally associate with them. Some Periclimenes shrimps do well with these hosts."