Help Needed !

[Fishian]

Hi Guys Need some help, Although i think i know what i gotta do ! Problem : my Male Krib has for some reason developed what i can only describe as "lockjaw" 2 Days ago i noticed he was unable to close his mouth and is struggling to breath properly. Unfortunately i've not seen him eat for the same amount of time and is becoming emaciated ! Stays in one spot and doesn't interact with other fish. No other signs of any disease or ill health, no other fish are affected in the tank. What should i do ?
Tank size: 30x12x15.
Filtration : Internal.
Stocking : 5 x Neons,1m/3f guppies, All Live plants.
Nitrites/trates Ph etc All within acceptable peramiters.

 

[WILDER]

Is there something lodged in his mouth.
Is there any red sores in his mouth.
What do the fish gills look like.
Is the mouth area swollen or red.
Could it have been caused by an injury.
Any whiteness to the mouth area.

 

[Fishian]

Hi Wilder and thanks for the response but Alas "tis not to be" ! Poor Yorick Has departed form this world into the BIG Aquarium in the sky Got in from work at 22:00 to find him passed Have looked at him closely but he's got me Baffled ! no signs of ANY problems whatsoever so i can only assume he had been fighting and come off the worse for it, Checked the rest of the tank and all is good, will keep a close eye on it for the next few days but as i say all looks ok.

 

[WILDER]

Bless him.
R.I.P.
Just do a few water changes with him dying in the main tank.

 

[Amanda1]

Lockjaw happens a lot in certain kinds of fish. Its caused by not enough variety in the fish's diet. I am experiencing this at the moment. Hopefully my lil guy will be able to get over it. I'm sorry for your lose.