I'm pretty sure my diamond watchman goby is dying. Came downstairs to find him in my 20 gallon tank that holds my water top off. He must have jumped out of my 120 and miraculously landed in that. However, when I put him back in the 120, he didn't seem to be doing too well. kept sinking tail first to the bottom and shooting back up. Now he's just kind of laying on the sand bed. I noticed a bright yellow color around his gills. Is it possible he picked up a disease from sifting the sand?


