If he has moved already, I’ll tend to say he is ok, just keep an eye on him. He should be just adjusting to the new tank.Saturday I put a tuxedo urchin in my 60 gallon and moved the pink one to the biocube. The pink one is having a blast, but the tuxedo urchin has not moved from its spot. It was sitting flat on the sand and now it’s on the wall, but still the same corner.... not sure if this is normal behavior of if it’s dieing...
The pink one: