Fish ID please

jk1138

New member
I got this fish, some sort of goby, with some LR i bought. I was told the name but forgot what it was in the confusion of getting the rock added. Any help is appreciated.
unknow fish.jpg
It has a white spot on its tail surrounded by a black circle. I could not get a full profile pic as it keep turning.
 
I got him from another Reefer's tank with about 150 lbs of live rock, that I split with a friend. I just read up on him, it is a herbivore only. So, because I like him, I am running out to a LFS to get his some food just for herbivores.
 
How did you get the mandarin to eat them. I have one, but luckily I have a ton of pod in my sump and in my DT. It is like a plague at night when only the moon lights are on.
 
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