I saw this white spotted marine fish in the pet store the other day. It seemed to be grazing on the fine substrate in the tank. It would take a bite, and then the substrate would sift out of its gills!!! I couldn't find the name on the tank anywhere and was in a bit of a rush so I didn't get to ask an employee. It was tiny, maybe an inch or so long. Any idea what this might be? Would love to get my hands on one if it's not "too" pricey.