Injured or Sick Engineer Goby

I don't have much to add that hasn't already been said - but I do know my engineer can get tempermental when he's hungry or if another fish (usually my coral banded shrimp) get too close to his tunnels. I've only seen him try a few times, and whoever the intruder is usually gets the hint and backs off.

I wonder if OFK is right, the big one going after the "sick" one. It could have gone after it, and now the one that got injured has a bacterial infection - which would explain the cloudy eye and slime coating. The slime coating is similar to how human's make scabs, although not as tough as a scab.

If it is a bacterial infection, I'd recommend a QT for the sick one with some antibacterial medication.