Rainbowfish moving his mouth non stop and not eating

One of my Bosmani rainbow fish is at the top moving his mouth non stop and not eating. He was swimming while doing this for a couple days now just staying near the top opening and closing mouth non stop. All other fish in the tank are doing well. Water parameters are spot on. I don't understand what's wrong with him
Some pictures.
Both rainbows. One normal behavior and appearance/shape. Other rainbow with issues. Is his shape normal? I feel as though it's not.
Tank 36 bow
What is the water volume of the tank? 36 gallon
How long has the tank been running? 9 months
Does it have a filter? Yes
Does it have a heater? Yes
What is the water temperature? 80
What is the entire stocking of this tank? (Please list all fish and inverts.)
2 male bosmani rainbows
5 female bosmani rainbows
2 german blue ram cichlids
1 powder blue dwarf guarami





Maintenance
How often do you change the water? once a week
How much of the water do you change? 15 %
What do you use to treat your water? Seachem Prime
Do you vacuum the substrate or just the water? Substrates
parameters - Very Important

Did you cycle your tank before adding fish? Yes
What do you use to test the water? API Master kit
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia: 0
Nitrite: 0
Nitrate: 5ppm
pH: 6.8

Feeding
How often do you feed your fish? 2x days
How much do you feed your fish? enough they eat it all in 2 min or less
What brand of food do you feed your fish? Fluval Bug bites flakes and pellets
Do you feed frozen? no
Do you feed freeze-dried foods? yes

Illness & Symptoms
How long have you had this fish? 5 months
How long ago did you first notice these symptoms? 3 days ago
In a few words, can you explain the symptoms? near top but not at surface. Opening and closing mouth nonstop . Stopped swimming. Stays in same position near filter. Stopped eating .
Have you started any treatment for the illness? No
Was your fish physically ill or injured upon purchase? No
How has its behavior and appearance changed, if at all? Not swimming. Not eating. Mouth open and closes constantly. Strange looking body shape?

Explain your emergency situation in detail. (Please give a clear explanation of what is going on, include details from the beginning of the illness leading up to now) I did in the post and these answers.
The normal rainbow pic did not load apparently.

 

The first few photos, the bosemani in them has a funny shape at the front under the mouth. Not sure what it is, could be a blockage/obstruction or it could have eaten something to big for it. Not sure how to help sorry but it does look off.

 

The first few photos, the bosemani in them has a funny shape at the front under the mouth. Not sure what it is, could be a blockage/obstruction or it could have eaten something to big for it. Not sure how to help sorry but it does look off.

Yes , it does have a strange shape. I feel as though he is dying. I don't know what to do but I do know he is extremely stressed and not looking good

 

Yes , it does have a strange shape. I feel as though he is dying. I don't know what to do but I do know he is extremely stressed and not looking good

Yes it doesn't look good unfortunately. If you do some research online there are some common methods for trying to remove obstruction/blockage/constipation - I think an epsom salt bath is one of them. I did see a fish eat a small pebble/stone once and couldn't spit it out, had a round blockage. But I don't think rainbows would do that given where they swim and how they eat.

Were there any small fish, snails or other critters in the tank it might have eaten or tried to eat? Any pellet or prepared food should have broken down by now.

 

Maybe fry from my guppy? Other than that no. Pellets I soften because they are hard. He just keeps opening and closing his mouth and moving his gills. I don't think he will make it. I will have to lay him away. I've never done it before and it sounds horrific

 

Maybe fry from my guppy? Other than that no. Pellets I soften because they are hard. He just keeps opening and closing his mouth and moving his gills. I don't think he will make it. I will have to lay him away. I've never done it before and it sounds horrific

I think the best thing you can do is use Clove Oil (if it's available where you are). You can catch him, put him in a small container/bucket (never put the oil in the tank) and slowly add drops until he ''falls asleep''. It's unfortunate but it looks like it might be the most responsible choice also. Sometimes fish just get old or sick and there's nothing that can be done, like with us humans.

Once the fish has passed the best thing to do is to dispose of them in your green/compost waste or regular waste. Some people might also bury them in the yard/garden or compost them at home. The only thing you shouldn't do is flush the fish or dispose of it in a local waterway.

 

I think the best thing you can do is use Clove Oil (if it's available where you are). You can catch him, put him in a small container/bucket (never put the oil in the tank) and slowly add drops until he ''falls asleep''. It's unfortunate but it looks like it might be the most responsible choice also. Sometimes fish just get old or sick and there's nothing that can be done, like with us humans.

Once the fish has passed the best thing to do is to dispose of them in your green/compost waste or regular waste. Some people might also bury them in the yard/garden or compost them at home. The only thing you shouldn't do is flush the fish or dispose of it in a local waterway.

Thanks so much. I will go to the all natural store today and get some