Gasping Diamond Goby

[mrbacony]

I just got a diamond goby yesterday. It is laying on the bottom of the tank and seems to be gasping for air while flicking what appears to be a tongue. The tank is two years old and very established. All test results are normal. Not sure what is going on with it. I will try attaching a video of the fish.

 

[vetteguy53081]

I just got a diamond goby yesterday. It is laying on the bottom of the tank and seems to be gasping for air while flicking what appears to be a tongue. The tank is two years old and very established. All test results are normal. Not sure what is going on with it. I will try attaching a video of the fish.
View attachment 3067238

How was fish acclimated and for how long?
What is current ammonia-salinity- temperature?

Did this fish try digging into substrate? Its not clear but looks like slight damage around mouth and the sand bed is quite coarse for this fush

 

[mrbacony]

He was acclimated for about 45 minutes via drip.
ammonia is 0, salinity is 1.025, and temp is 78

he has not tried digging yet, which is very unusual. I have had other sand sifters with no problem. The sand is special grade Carib sea, so it should not be too coarse