I've had a new plant pop up in my pond within the last two to three weeks. It is distributed in seemingly random locations around the edges of the pond. The first bloom that I noticed started in water approximately 2 feet deep and has now grown to the top of the water.

I've searched the forum to try and identify it myself but I'm unsure about a match. I want to be sure that I have the correct ID before I do something that I regret later.

Three questions: What is it and is it a problem plant?; and, Should I try to physically remove the plants? It's not all that widespread at the moment but I've noticed that it breaks apart easily and floats so I don't what to do anything that could spread it without more info, particularly if it is a problem plant.

Thanks in advance for any help.