That's gas. What you see there, happens in the intestine, and builds up to the point where you pass it. It could be indicative of something you ate, or a sign that the microbial environment in your bowel system has bee altered in someway.

Shroom

Hi. I too have lots of bubbles rising to the surface like champagne. You have gut dysbiosis and those bubles are caused by the excessive bacteria fermenting your food, this is a form of auto-intoxication. I have been diagnosed with SIBO following the breath test. Do you suffer with excess bloating and noisy stomach? Do you ever feel jaded on waking in the morning as if you were drinking the night before but in fact you hadn't drank any alcohol?