Fish with open mouth

Is it gasping for air or breathing heavily?

what if it is, what does this mean?

Gasping or breathing heavily could mean the water is short on O2. Also could indicate ammonia or some other poisoning as it would cause severe irritation to the gills. I really don't know though as it could be from a number of factors...best bet for the OP is to check the water params (exact ammonia, nitrite, nitrate) and post them here as the majority of fishy problems stem from bad water quality.

Neervana said:

what if it is, what does this mean?

Click to expand...

If it's gasping, there could be low O2 content in the water or decreased gill function which is usually caused by Ammonia / Nitrite.

it could have something stuck in its mouth or jaw preventing it from closing

Possible injury?

I think we need more info from the OP...