With the current in my tank, it's hard to tell. Even my blastos inflate like crazy and look like they are pulsing as the MP-40's go through their random program. This is a very interesting and unusual coral. I originally mounted it mid point in the tank but found it developed a temporary case of E.D. :~ and retracted . I moved it to the bottom and it re-inflated :* and reopened right away. It can be very limp but not as much as a deflated as a xenia. Quite an interesting transformation to observe. Despite it's somewhat bland color, it's a very welcome addition to my little world. It's showing all the signs of pushing out new growth so I'll be should be able to put a couple DBTC frags back into the system in just a few months.