Missing blue linkia...

I added a blue linkia last Saturday to my 65g aquarium. I did the usual
float teh bag for 20m, then 1h of slow drip acclimation before i added
him to my tank. Well, the guy has gone completely missing. He was in the
tank on day 1 (Saturday), on Sunday he was hiding on the back side of
the rick (you could see one arm if you looked down the side of the tank)
and now I can't seem to find him anywhere.

I've got an orange linkia star (it's actually more red than orange) in
the same tank and he's always hangin out on the glass where you can see
him. Is this normal behavior for blue linkias?

Just wondering in Concord, NC...

mark h

PS liveaquaria.com is running a sale this week on "super colored"
croceas for $39.99 - which includes their 15-day guarantee. I got one in
today and it's *very* nice...
http://www.liveaquaria.com/product/p...fm?pCatId=1650