What are antibubbles?

Today I just discovered that you get antibubbles when you add diluted Dettol to diluted Dettol slowly. 
When you really dilute Dettol, after sometime it separates into two layers of the heavier part and the lighter transparent part. And then you shake the bottle really well and pour a bit of it to a vessel and then slowly add Dettol from the bottle into the vessel......
You get antibubbles!! 
It's actually the first time I'm seeing antibubbles in real life.