Ok, heres my input, My LTA has spawned three times in the past year, when I say spawned, I mean releasing err, uhhh,,,, you know what into the water for over an hour, causing the water to be very cloudy overnight but clearing the next day, after this occured, the anemone would bury itself below the sand surface rendering it invisible. When this happened, all the fish would hide. Do you recall if your skimmer was acting unusual while the water was cloudy? If so, this may be what happened.