Just updating everyone, I ordered 3 of these from KP aquatics back in March. 1 died due to long shipping time. Think it ended up going out on the day after a holiday or something happend. But it was no fault of KP. So the biggest died. The medium and small one are still all around my tank , very active, never really goto top to "filter feed" I've only spot fed when they are around close when feeding time. I can confirm they will or at least mine will eat mysis shrimp with no issues at all. The one thing I wanted to note is that MINE or SOME or MOST or just MINE lol LOVEEEEEEEEE Green Star Polyps. They will often flock to the GSP when im guessing they are hungry and know they can get a guranteed meal from them. They will come sit on the spot they want and pretty much stay there for hours , mins , days lol . After they are done they move on. So if you like your green star polyps to be out and nice and green and full, just know your taking a chance with these star fish, how big or how small I dont know , but both of mine will snack on them from time to time. Not all the time and sometimes it seems like days / 1 week lol before they go back. But overall damage to the GSP is minimal they seem to repair quick , and or are so bushy when they go full you cant see the little spot that they Starfish nawed on. So I just wanted to give my experiance with these little guys. I think im about to order a couple more. They are out and around quite abit.