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I have check the sand in the area I left him last night and it’s not under there, could something have eaten him? I have looked with a flashlight everywhere I’m freaking out!!Probably just under the sand hiding give him some time im sure hell show up.
but as long as you take it slow and research along the way it will be very rewarding! 
Thank you for the support, I’m gun shy because I keep trying new things and a lot of the time I am not successful, I’m starting to get frustrated.
My tank has been up and running for two years this March. I have cured live rock from my lfs. I have two clowns, a transparent goby, a dwarf angel, and a small yellow tang. My cleanup crew is a emerald crab, a fighting conch, sand sifting star, turbo snails, and a number of blue legged hermits. The only thing I have added in over three or four months was the rock flower nem and that was now four nights ago he stayed in the same spot till last night when he disappeared. Thank!How long has your tank been set up? What type of live rock do you have - dry, aquacultured, cured rock from an LFS? What over fish and CUC do you have besides the two shrimp?
There are a number of things that may be going on...
It could have moved itself to your rock and found a crevice to hole up in until it acclimates to your tank.
It may have curled/balled itself up do to a little bit of shock from the transition into the new tank and been blown by the current into a crevice or cave and be resting on the sand floor somewhere within the rock where you can't see it.
It may have been eaten by something during the night. (I had one disappear on it's 5th night. Found the remains floating on the sand within my rockwork a couple days later. Turns out a nickle-sized polyclad flatworm hitchhiked in on my aquacultured rock and came out at night to eat it.)
The best thing you can do is to just wait and watch. It will either turn up, or it won't. Whatever you do, don't start shifting rock work or stirring up sand in a panicked effort to find it. It will only cause stress for the rest of your tank and possible harm to the nem if it's in hiding and you inadvertently damage while digging around.

I hope that’s all it isYour nem went on vacation![]()
I think we all go through that. Years ago, we found we could not keep mandarins, clams, or anemones. No matter what we did, they died. I now have a blue max clam thriving and a tank dedicated to anemones and clowns (I haven’t tried the mandarin). Time, technology, patience and knowledge have made all the difference!Thank you for the support, I’m gun shy because I keep trying new things and a lot of the time I am not successful, I’m starting to get frustrated.

