Dying Diamond Goby?

[Aligrel]

I wasn't quite sure where to post this.. but this forum seemed general enough for my question.

So.. I am pretty sure my diamond goby is dying, and I'm wondering if there is anything I can do about it/if anyone can tell me why it has fallen ill like this.

The goby keeps flipping upside down, and just lying on the floor of the tank. Whenever another creature (fish or shrimp) comes near it, the goby will swim away and sometimes flip itself right side up again for a while. It appeared perfectly fine this morning, but now it is in this state.

I've had this tank for almost a year now.. And I've owned the goby for maybe 3-4 months. All of the other fish appear to be healthy, and all of the water tests read perfectly.

I attempted to feed it, because it looks very skinny, and it appeared to be eating.. but then again it could just be territorial now and was attacking the food. I don't know. I'm still very new to the fish world.

Any information will help, thank you.

 

[Newb_reefer1]

It's going to die. Redness around the gills probably an infection of some type.

 

[ChiCity]

Sadly, that fish is going to die.
Could be a swimbladder infection based on your observations, could be a hill inflammation as mentioned earlier.
Hard to really tell.