majano anemene related to aiptasia i think...use to have one in my tank
i know its not aiptasia for a fact. this thing looks like a polyp of somesort. it closes up and looks like a closed button polyp during the day and only opens at night when my moon light is on. that is not a characteristc of aiptasia it is more like a coral but is strange because it only comes out at night.that is not a snail. its an aiptasia for sure. but it can also be some type of coral that came with your live rock.