I just purchased a purple long tentacle anemone from LiveAquaria about a week ago. When I first put him in the tank he settled on the rock and stayed there for a couple of days and they he disappeared. I found him on the back of the rock work and moved him to the sand bed in front of the rock work. he attached himself to a small piece of rock and looks healthy but his color is not purple anymore but a brownish red. Is this normal for anemones to change color. This is my first anemone so I do not know that much about habits.