Platoma / Nemastoma gelatinosum is common in the Carribean and bears flat ramifications mostly, in a wide variety of colors... The unidentified specie we are dealing with at SBMarine has spherical ramifications that are not grouped around a crown... It could be a specie from the Indian Ocean or Madagascar or the Philippines who knows... Our largest specimen yet reached five inches until EOS knocked it from it's holdfast; same happened to the two above (2 inches). Once the thin thread that holds this plant is broken: it is doomed !
Growing it is... problematic to say the least. The right water flow around it is not easy to achieve... Although they can develop in moderate light; they do just right under 6,500K bulbs in our tank. Growth requires time but depending on water chemistry they can sometimes prosper more rapidly... Defining ideal conditions is out of our reach for now... Our sole objective is to unlock their reproductive mysteries in order to propagate them !
Nemastoma is no Caulerpa: each plant is a single specimen and each one is fastened to substrate by a single tiny thread... Nemastoma is as fragile as it is lovely and often catches the eye before any coral !! It is well worth the time consuming task of preserving it...
If you view your marine tank like some view fast food: you might get into a frustrating experience. By comparison; Sinularia dura coral grows fast and is easy. Nemastoma should be viewed as a jewel that can only be crafted through time honored skills, knowledge and experience.