Locked jaw!

[pseuro]

Hi All,

Sharing my little bit of experience that just happened to me today. Noticed a fish with a locked jaw (mouth stuck wide open) during feeding and started to swim in distress (half floating, twitching, etc). After observing for a little bit I thought the fish was a goner, started floating into territories of other fish and not swimming away when getting nipped at. Seemingly defenseless I decided to separate the fish. Lucky enough just as I net the fish its jaw closed in the net! Now he or she is separated and eating again. *PHEW* Some damaged fins but should heal back in no time. 

Have any of you experienced a fish with locked jaw? I believe usually it's from fighting, but maybe this fish was overly excited during feeding? 

[Mastiffman/ Duramax7Man7]

I would have to say that it may be a vitamin deficiencies of some sort. Or maybe it was fighting and it's mouth bones were hyper extended and got locked open? Other than that I don't really see why it would happen. Glad it's back to normal though.