those are a type of small anemones.i had them but they died off.they don't get any bigger and will likely die off.i saw them at the pgh zoo,hundreds of them and they had not labeled them.their not aiptasia or mojano
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55 gallon reef with 4x54 watt t5,29 gallon sump,red monti cap,1blue echinophyllia,trumpet,red lobo,2 toadstools 1purple and 1neon,gsp,xenia and yellow xenia,red ,many mushrooms,2 giant frilly shrooms,cabbage coral,yellow polyps,many zoos,1 orange and one neon green nepthia,duncans,cladiella | 
Red basis and whtie tentacles 
