1 Multi Colored Rhodactus aka "Wartie Mushroom", "Tongan Mushroom" attached to small piece of rock or rubble. Multi Colored Please note, that when mushroom corals are shipped, it is perfectly normal for them to be deflated and very small upon arrival. Once adjusted to your aquarium conditions, however, they will fully open. The acclimation process normally takes several days to a week. Approximate Purchase Size: 3/4" to 1"