I could be wrong, but I don't think it's dinos.
Dinos are like the reefing boogie man. Usually when you think it's dinos, typically it's just a regular nusiance algae that's starting to proliferate from a raising nutrient source. Either detritus accumulation, or free in the water column. The bubbles on top is not isolated to dinos. All forms of algae or bacteria give off some sort of gas as a waste product, so any algae can have bubbles.
The tank looks fairly new, but correct me if I'm wrong.
How long has the tank been up?
What rock did you use?
Did you presoak or "cook" the rock
Are you running any GFO or other form of nutrient export or carbon dosing?
What is the bio load?
How often do you feed?
My bet would be that it's just a simple nutrient issue from "new tank syndrome".