Why is my gourami doing this

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forgot to add, water levels are good, temps at 25.5C. only thing that changed was the oto's i added last week. he/her been eating normal, was fine this morning. when i got home from work he was doing this
 
What's he doing? I can view or see any video using my iPhone, a lot only use phones so may not be able to see the videos you have posted
 
That's so sad. Sorry to hear he didn't make it. I just bought my first 4 gouromis this evening. I hope mine do OK.
 
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