Update 12/8/2016: Image and document uploading instructions. Click here.
However, also had a pair of Betta imbellis, where male had built and was guarding a bubble nest, in this tank shortly before the Paradise fish. So could be a mix of fry growing out. What do you think? I'll update this thread as they grow.
I agree with Frank. My juvenile paradise fish don't look like that.
Added some pictures and another video from today: