This photo shows a few different flow phenomena. First is high viscosity laminar flow as the fluid enters the water, after that, gravitational instability combined with the fluid slowing down, causes the flow to fold and stretch. The stretching may also be an example of 3D viscous fingering too. It is also interesting to look at the very bottom of the flow. Here it looks like the flow kept some of its original shape from when it entered the water, causing a creater that turned the flow into a bell-like shape.

This photo was taken on a GoPro Hero 11. Blue Corn Syrup was then poured into the vase from a few inches above. The lighting was achieved by using a piece of semitransparent folder material as a divider in the vase with an LED light behind the vase. The original file was a video, and this is an exported screenshot from it when I thought the flow was the most interesting and in focus. Then, from Google Photos, I increased the contrast, used an AI unblur tool, and decreased the brightness.