anmone

So I live in Oregon and have a tide pool tank for lack of a better word...it all started wiha a couple what we thought were empty shells and a rock that my daughter grabbed from the beach, we get home and to my surprise the "shells" were little hermit crabs and the rock had a limpet attached, so...

I woke last night and saw my bta had no tentacles. All that was remaing was the base. I thought he would be a goner. When i awoke in the morning, 4 hours later, he had tentacles and looked normal??? How is this possible or was i sleep walking?