User blog comment:B214/Season 3 confirmed!!!!!!/@comment-16281343-20141206095510/@comment-16281343-20141206101504

Thinking about it, it cannot be Great Red nor Tannin. There illustrations doesn't have horns like that.

So, the only possible thing that can fit the timeline is JD. That may be the reason why it was only shown for 1-2 seconds.