Does anyone else have this happen?

I've had this happen with several anemones.  All different.  I wish I knew why but I don't.

Adam

Other thing to check is any powerheads intakes or your overflow and sump (if you have one) Anemones tend to like the water movement associated with powerheads, and they end up getting sucked into the intakes. Depending on how large your rbta was, it could be potentially a fatal situation.

Dont mean to be the harbinger of bad news, but it is a possibility.

Then again, Pistonfister had a bubble tip take a ride down the overflow into the sump and was just fine.

So you never know.

Hello everyone,

Do they often hide for long periods of time?

First of all, they also tend to wander around for a few days before settling. Beyond that, it's not uncommon for anemones to find a spot they like on the back of a rock and disappear.

should I be worried?

I wouldn't be concerned yet. Give it a week and it will probably find a spot it likes. If it decides to live somewhere that's out of direct sight, leave it alone. Given time, the anemone will grow and will have to expand to your viewable area.

Keep in mind, as it grows it will take up a lot of real estate.

Is this normal behavior???

Yep.

Hope that helps,

Chris