about a month ago i bought a new baby yellow tail corris wrasse..ever since i put him in the tank he has been hiding under the sand...is this normal? i saw him this morning for the first time in about a week..i thought for sure he had died..i fed him some frozen brine shrimp..he ate then just layed on the bottom of the tank for about 10 minutes..he wouldn't swim much..is this normal? he them re barried his self again in the sand...has anyone ever had any experance with one of these fish before..that maybe they can give me some advise on they're behavior?...