thats what i though too but these little buggers are good at hiding. when i shine a flashlight at night i find more. i do think these are the last ones though.
When you frist got them how long till you saw them do any thing ??? I got 6 of them and I don t see any thing happening. how big are your do you have a pic ???
they are small. these guys stay small, never seen one bigger than an inch. they are VERY hard to see. if they are eating well you may never see them. the best way to know that they are still alive is to monitor your aiptasia population. maybe at night scan some rock with a flashlight. sorry no picture, to hard to capture with a simple iphone camera, especially on the background of a rock.